42 results about "Virtual optical network" patented technology

The invention relates to an optical network unit management method and an optical network unit. The optical network unit management method includes the steps of registration, online and offline management, power supply management, multicast, version upgrading and the like. The optical network unit registration method is achieved based on the optical network unit. The optical network unit comprises processing modules and multiple VONUs. The multiple VONUs correspond to multiple user physical ports or user logical ports one to one respectively. The registration process of all the VONUs is controlled through the processing modules in a coordination mode. The multiple VONUs are virtualized in the optical network unit, the VONUs correspond to the user physical ports and/or the user logical ports one to one respectively, and then the problem that the operation, maintenance and power consumption cost pressure of existing optical network unit equipment is large is solved.

Disclosed are a multi-domain controller, a single-domain controller, and a software-defined optical network system and method. The multi-domain controller at least comprises a virtual network service manager. The virtual network service manager is configured to process a cross-domain or single-domain virtual optical network service (VONS) service request from an application layer. The cross-domain VONS service request is divided into two parts to be processed: an inter-domain part and each intra-single-domain part. The inter-domain part of the cross-domain VONS service request is processed by the multi-domain controller; with regard to a service request for a bandwidth on demand (BOD) connection attribute in the cross-domain VONS service request, the request is forwarded to a routing connection controller; and with regard to a service request for an optical virtual private network (OVPN) attribute in the cross-domain VONS service request, OVPN service processing comprising establishment and deletion is performed according to acquired virtual network layer resources.

The invention discloses an SDN framework based virtual optical network oriented mapping method. The method comprises: step 1: determining a virtual request and network parameters of a physical bottom layer as well as a topologic structure chart, creating a topologic auxiliary chart by taking VON-FP values as weight values of links, and determining an optimization target; step 2: arranging the links on the topologic auxiliary chart in an ascending order according to the VON-FP values, performing classification according to the virtual request, and determining a mapping mode according to a mapping rule; step 3: establishing a framework of a method for population based global search and individual based local heuristic search, and performing solution mapping on classified virtual optical network requests by using the search method; and step 4: repeatedly and iteratively searching for a mapping method to obtain an optimal mapping scheme when a fitness function is minimal, and distributing the scheme to an SDN based NOX framework to perform specific data calculation and traffic forwarding operation. According to the method, the efficiency of multi-domain virtual optical network mapping is improved and the failure rate of the whole network after mapping is reduced.

The invention discloses a virtual optical network cooperation mapping method. According to the characteristic attribute of the virtual nodes and the virtual links in a virtual optical network, the virtual optical network cooperation mapping method can perform mapping sequence division and classification, and can determine the mapping sequence of the virtual nodes and the virtual links, and can configure a standby path corresponding to each node in advance, and can construct a physical optical network mapping auxiliary graph for the preconfigured path based on each node, and can map the virtual links to the preconfigured path of the physical optical network according to the bandwidth requirement of the virtual links and can determine the transmission rate and the corresponding modulation format of the selected path, and then can distribute the corresponding bandwidth resource on the selected path until all the virtual nodes and the virtual links are mapped to the physical optical network so that the cooperation mapping process of the virtual optical network can be completed. The virtual optical network cooperation mapping method solves the problem about optimization of network resource mapped to the physical optical network by the virtual optical network.

The invention discloses an optical access network, and a method, a system and an apparatus for backuping an optical line terminal. The system comprises the optical line terminal and an optical divider, wherein the optical line terminal is used for detecting a connection state of the optical line terminal and an opposite end optical line terminal through the communication of the optical divider and the opposite end optical line terminal when the apparatus is in a backup state, and performing main backup state control and main backup data synchronization according to the connection state; and the optical divider is used for communicating an main backup optical line terminal with virtual optical network units in each optical network unit and the optical line terminal. The invention causes a virtual ONU to be responsible for communicating with the backup OLT corresponding to the OLT through integrating the virtual ONU in the OLT, thereby realizing data communication between the OLT fault detection and the main backup OLT, further realizing rapid and reliable data communication functions between the main backup OLTs, and rapidly realizing the switch between the main backup OLTs when the main OLT has the fault.

The embodiments of the invention provide a virtual optical network multilayer resource convergence method and system. An application controller and a network controller are used for carrying out combined management and scheduling on global network resources, and global optimization of multilayer resource combined interaction is realized. The virtual optical network multilayer resource convergence system comprises a multilayer resource convergence unit, a virtual resource management unit, a virtual path calculating unit, a configuration management unit, a resource database and a business management unit. The virtual optical network multilayer resource convergence method comprises the steps of control state activation, application resource judgment, application resource convergence, network path calculation, path time delay calculation, flow constraint judgment, single-flow path network resource judgment, multi-flow path calculation, multi-flow path network resource calculation, multi-flow path network resource judgment and the like. The method and system are adopted to respond a virtual network request, the path blocking probability is lowered, and the network resources and the application resources are flexibly converged.

The invention relates to a resource equalization virtual optical network mapping method based on time-frequency fragment awareness, belonging to the technical field of optical fiber communication. Inthe method provided by the invention, a weight formula of a physical node and a physical link is designed, and time and bandwidth resource in a network are weighed while a virtual network request is mapped, thus, bandwidth blocking rate of a virtual request service is reduced, and resource utilization rate in the network is improved; in a process of allocating spectrums for the virtual request service, fragmentation degree of a frequency slot on the link in a physical network in a time domain and a spectrum domain is considered, a spectrum block which has low fragmentation degree in the network after allocation is selected to server the service, and thus, spectrum fragments generated on a service transmission path are reduced. The invention provides the resource equalization virtual optical network mapping method based on time-frequency fragment awareness, the method not only can effectively reduce bandwidth blocking rate in the network and realize equilibrium distribution of the resource in the network, but also improves utilization rate of the spectrum resource in the network.

The invention relates to an efficient virtual optical network survivability mapping method for service reliability, and belongs to the technical field of optical communication. According to the method, during virtual node mapping, a physical node weight evaluation criterion comprehensively considering physical node attributes is designed, and virtual nodes with large weight values are sequentiallymapped to physical nodes with large weight values; during virtual link mapping, a working optical path selection strategy considering idle spectrum resources and optical path reliability is designed,and a protection optical path selection strategy for improving protection optical path reliability and protection bandwidth sharing degree is designed; and meanwhile, a frequency spectrum partitioning method is introduced, a working light path frequency spectrum allocation method based on frequency spectrum integration factor perception is designed, and when frequency spectrum blocks are allocated to the working light path, the frequency spectrum blocks enabling frequency spectrum resources of a physical light path and adjacent links to be more integrated are selected. The method provided bythe invention can effectively improve the request acceptance rate of the virtual optical network and reduce the bandwidth blocking rate.

The invention relates to a node importance sensing transparent virtual optical network collaborative mapping method and belongs to the technical field of optical fiber communication. According to themethod, in a virtual network node mapping phase, virtual node and physical node importance measurement formulae are designed; the proximity of unmapped nodes and mapped nodes, and the spectrum compactness of mapping paths are comprehensively evaluated; and through adoption of a node-link collaborative mapping method, a pair of adjacent virtual nodes are mapped successfully, a virtual optical linkbetween the nodes is immediately mapped, and spectrum resources are allocated on a mapped physical path. According to the method, the relatively much virtual optical network service is transmitted with the relatively fewer spectrum resources, link spectrum fragments are reduced, the node mapping compactness is improved, profits of a network operator are improved, the mapping length of the virtualoptical links is reduced, and the quality of service of the service is ensured.

The invention relates to a virtual optical network synergetic mapping method based on spectrum dispersion sensing, and belongs to the technical field of the optical fiber communication. The method comprises the following steps: the node weight takes the residual computing resource size and an element of an occupied geographic location in the whole network topology by the physical node into consideration when the routing is selected according to the physical node weight, and the balanced use of multiple physical node computing resources is realized through regulating the weight factor. In the spectrum distribution, the link spectrum dispersion formula and a judgement criterion of a reloading link are designed in the mapping process for reducing the spectrum use amount and the spectrum fragments, the spectrum use amount and the link spectrum dispersion degree on a candidate optical path are computed by combining with a location of the mapped physical node, the optical path with less consumed frequency slot and low spectrum dispersion is selected to perform synergetic mapping with the adjacent physical node. Through the method disclosed by the invention, the bandwidth use ratio is improved, and the network blocking rate is reduced.

The invention discloses a virtual optical network mapping method, and the method comprises the steps: calculating the virtual importance of each virtual link according to the bandwidth demands of thevirtual links in a virtual optical network and the resource demands of virtual nodes; calculating the physical importance of each physical link according to the path condition of the physical link andthe resource condition of the physical node in the physical optical network; sorting the virtual links according to a descending order of the virtual importance degrees to form a mapping sequence; obtaining a current virtual link to be mapped according to the mapping sequence; determining the physical link with the highest physical importance in all the current remaining physical links as the current physical link corresponding to the current virtual link; and configuring physical resources meeting the mapping requirements of each virtual link in the physical optical network. Moreover, the virtual optical network mapping device, equipment and medium provided by the invention correspond to the method, so that the network cost of mapping can be reduced as much as possible, and the maximum profit can be obtained.

The invention discloses an enhanced path-based virtual optical network mapping method, including the following step: establishing a virtual optical network mapping model under an elastic optical network and a solving method thereof. Thereby, the sharing conflicts of spectrum slot resources on different paths of the same link can be avoided, a minimum spectrum slot is taken as an objective function, network resource fragments can be reduced, and thus the receiving rate and mapping revenue of virtual optical networks can be effectively improved.