303 results about "Logical topology" patented technology

Embodiments are provided for implementing control plane functionality to configure a data plane at a plurality of network nodes. A software defined topology (SDT) component is configured to determine a data plane logical topology indicating a plurality of selected nodes and a logical architecture connecting the selected nodes. The data plane logical topology enables traffic delivery for a service or virtual network for an end-customer or operator. A software defined networking (SDN) component is configured to interact with the SDT component and map the data plane logical topology to a physical network. The mapping includes allocating network nodes including the selected nodes and network resources which enable communications for the service or virtual network and meet QoS requirement. A software defined protocol (SDP) component is configured to interact with the SDN and define data plane protocol and process functionality for the network nodes.

The invention discloses an automatic identification method and system of low-voltage power distribution network topology based on based on power frequency carrier communication technology. A concentrator and an automatic topology identification device are installed beside each transformer in a low-voltage distribution network court, the concentrator and the automatic topology identification device are connected by a 485 line, a dual-mode collector is internally or externally arranged on an intelligent electric meter of the low-voltage distribution network court, an intelligent power distribution network topology identification master station is installed in a power marketing center or a power operation and inspection department, then the intelligent power distribution network topology identification master station performs automatic identification via the above equipment, the automatic identification converts the newly established topology link relation table data into a geographical topology diagram and a logic topology diagram of the low-voltage power distribution network, updates the original geographical topology diagram and the original logic topology diagram of the court, and records a topology state change event. The automatic identification method and system disclosed by the invention are conducive to updating the data in real time and greatly improving the timeliness of operation and maintenance, and patrol and repair, and play an important role of improving the economic benefits of power enterprises.

The embodiment of the invention discloses a virtual network mapping processing method and system. The method comprises the following steps: according to perimeter network status information of each region sent by management entity equipment in each region, dividing the request topology of a received virtual network topology request into a plurality of virtual subnets, and decomposing each virtualsubnet into a virtual element request sequence respectively; distributing each virtual element request sequence to the management entity equipment in each region, and carrying out mapping matching onthe logical topology and physical topology of each virtual subnet by the management entity equipment in each region in accordance with each virtual element request sequence; and merging virtual subnet mapping information sent by the management entity equipment in each region, and feeding back generated final mapping information after merging to virtual network users. The system comprises central management entity equipment and a plurality of regional management entity equipment. By utilizing the method and system provided by the invention, the processing bottleneck problem caused by overhigh computing resource consumption in the prior art is solved.

The present disclosure describes systems and methods for reconfiguring the links made by a plurality of optical circuit switches between the nodes of the first layer and the nodes of the second layer that reduces the throughput loss when the network transitions form a first logical topology to a second logical topology. More particularly, the first logical topology is realized by a specific physical topology, while the second logical topology may be realized by one or more physical topologies. The disclosure describes a method for selecting a second physical topology from the one or more physical topologies that will realize the second logical topology while reducing the number of links within each of the optical circuit switches that must be reconfigured (i.e, disconnected from their present ports and reconnected to new ports within the optical circuit switch) to transition from the first to second logical topology.

The present invention relates to a solution for taking a network equipment in a communication network as a root node to generate a logical topology tree for a subscriber terminal which requests the sending of multicast packets, and then generating a multicast tree on the logical topology tree with the network device as the root node, so as to forward the multicast packets. With the solution of sending a multicast packet to the subscriber terminal, it can effectively save the network bandwidth resource and reduce the transmission delay of multicast packet.

The method comprises: in ASON logical topology, searching a standby work path and a standby protection path; when receiving a service connection request, then calculating the weighting of each standby work path and the weighting of each standby protection path; based on it, determining a work-protection path pair; using the work-protection path pair to bear service.

Various embodiments are described herein to enable physical topology independent dynamic insertion of a service device into a network. One embodiment provides for a network system comprising a set of network elements to interconnect a set of host devices, the set of network elements having a physical topology defined by the physical links between network elements in the set of network elements and a logical topology defined by a flow of network data between a network service device and a client of the network service device, wherein the physical topology differs from the logical topology, and a network management device including a service policy module to monitor a service policy of the network service device and automatically configure the logical topology of the network elements based on a change in the service policy.

A link based network protection path calculation mechanism wherein a protection route is calculated that is guaranteed not to traverse the link it is intended to protect. The mechanism takes advantage of the fact that the same color cannot pass twice through the same optical fiber. The protection path is determined by eliminating all colors from the logical topology of the network except for the color corresponding to the link to be protected before executing the search algorithm. This serves to guarantee that the protection path calculated will not traverse the same physical fiber as the link to be protected. Virtual colors can be assigned to the links running through fiber bundles such that they do not pass through the same fiber / bundle twice.

There is provided a method for mediating the flow of messages in a computer network having a mediation architecture that includes a plurality of logical nodes arranged in a logical mediation cycle. The method provides algorithms for: handing mediation tasks over between mediator nodes; reconfiguring the logical topology of the mediation architecture in response to a change request while maintaining system invariants; and refining the structure of the mediation architecture by adding whole subnetworks in place of single nodes. The method also addresses failure detection and recovery.

A method, system and computer usable program code is disclosed for mapping a logical topology to information technology (IT) resources. The method comprises the steps of generating a logical topology of resources for a solution to a given request for resources, extracting information about shared rules and constraints on IT resources specific to a plurality of customers, and generating multiple mappings from the logical topology to the IT resources that satisfy said shared rules and constraints.

Methods, apparatus, and products are disclosed for executing an allgather operation on a parallel computer that includes a plurality of compute nodes organized into at least one operational group of compute nodes for collective parallel operations, each compute node in the operational group assigned a unique rank, that includes: determining a contention-free logical ring topology for the compute nodes in the operational group; configuring, for each compute node in the operational group according to the contention-free logical ring topology, a routing table to specify a forwarding path to the next compute node in the logical ring topology; and repeatedly, for each compute node in the operational group until each compute node has received contributions for all of the other compute nodes in the operational group, forwarding a contribution for the allgather operation to the next compute node in the logical ring topology along the forwarding path.

The present invention discloses a topology data extraction method based on an AutoCAD plane intersection engineering drawing. The method comprises the following steps of: extracting all line-shaped road markings in a road marking layer, and performing clustering to form a road section array; traversing elements of the road section array, extracting a driveway edge line and a guide arrow, determining whether a road section is a two-way traffic road, extracting a separation facility for opposite traffic flows (a two-way traffic section) and driveway boundary lines, and generating a geometric topology sub-section Link; according to an average value of intersection points of all Link extension lines, generating a geometric topology node Node, and calculating a north angle NorthAngle of each Link; generating a logical topology directional road sub-section Arc; generating a logical topology lane, and associating the lane with the guide arrow; and generating a logical topology lane connector LaneConnector. According to the present invention, a complete geometric topology, a complete logical topology and complete turning rules of an intersection can be obtained, thereby enriching intersection modeling methods.

The present invention provides an approaches to planning of chip interconnection line power-optimized layout stage buffer, belonging to interconnection line design optimization field of technology, characterized in containing follow steps: reading module information and interconnection line information, establishing circuit logical topology, initializing side state being 1, calculating time relaxation measurement between the module interconnection lines, calculating each side weighing in the logical topology, obtaining maximal cut set of the logical topological diagram by pre-flowing boost method, distributing time relaxation measurement to each side of the cut set, for each interconnection line, calculating need buffer size and numbers and total interconnection lines power dissipation according to the distribution result of the time relaxation. The invention reduces total power dissipation of the interconnection line without sacrificing circuit time lag performance, having great executing efficiency and industrial application price.

A method for reconfiguring a packet-switched communication network using a network protocol for installing a logic topology of the network formed as a spanning tree is disclosed. The method includes detecting failure of a direct link to a root bridge of the spanning tree by a first bridge; detecting the failure of a direct link to the root bridge by a second bridge; transmitting a first configuration frame generated by the first bridge to other bridges; receiving the first configuration frame by a third bridge and transmitting a second configuration frame, generated by the third bridge, to the other bridges; detecting the first or second configuration frame by the second bridge and transmitting the third configuration frame generated by the second bridge to the other bridges; receiving the third configuration frame by the other bridges of the network and triggering a reconfiguration of the network with detection of a new spanning tree by the network protocol.

Aspects extend to methods, systems, and computer program products for using declarative configuration data to manage cloud lifecycle. A declarative language can be used to declare physical and logical topology as well as lifecycle management commands at multiple topology hierarchies. Developers of different cloud components can declare roles and cloud operations in compliance with a declaration model. Compliance with the declaration model allows aggregation and cross-referencing among commands and topology elements declared by different developers. As such, dependencies between components can be efficiently identified and accounted for when implementing lifecycle management commands Declarative configuration data can also be used to onboard additional components to a cloud without code changes to an underlying lifecycle state manager.

The invention relates to a device unified control method, device and system based on the software definition technology in a network control system. The method is achieved through a system composed of three parts including a network management system device, a controller device and an agency device. A network management system conducts initialization on physical topologies and configuration on logical topologies of bottom layer controlled devices, groups the bottom layer controlled devices, divides functional domains and territories, and conducts multi-group multi-region unified control over the bottom layer controlled devices. In addition, overall tasks loaded by a manager are resolved, subtasks for a controller are generated, and finally the controller resolves the subtasks into original subtasks for the bottom layer controlled devices, so that intelligent implementation of the tasks is achieved, and overall control is achieved. Meanwhile, configuration information of the bottom layer controlled devices is loaded through the network management system, control information is processed through the network management system, the controller and the agency device and is finally issued to the bottom layer controlled devices, and the aims of configuring commands and configuring different manufacturer devices in a unified mode are achieved.

The invention discloses a road network connectivity detection method and a device based on mass e-maps, which belong to navigation technical field; the detection method includes that: the road network is constructed into a road network logical topology graph according to the traffic flow direction of the roads in the road network; a road in the logical topology graph of the road network is optionally selected as the starting road; the interconnected roads are read in the logical topology graph of the road network according to the traffic flow direction of the starting road in the road network; the read roads are detected whether being preset with traffic rule information, if no, other roads in the logical topology graph of the road network are continuously read according to the traffic flow direction until the traffic flow direction returns to the starting road so that the efficiency on detecting the connectivity of mass road network information is improved.

The invention relates to a method for graphically representing network topological objects and network topological object relationships in network planning. The logical topological structure of a physical network is represented in a topological graph drawing area in planning software by the following operation steps: 1, drawing a station and nodes; 2, drawing an optical cable between two nodes; 3, drawing an optical fiber pair on the optical fiber; 4, drawing end-to-end service connection between the two nodes; 5, drawing a shared risk link group; 6, creating linear multiplex section protection; 7, creating a ring; and 8, creating service route. In the method for graphically representing the network topological objects and network topological object relationships in network planning, the graphical representation mode is direct, simple, clear and complete, all network topological objects in an SDH / ASON network are covered basically, and thus, it is relatively easy to define a mathematic model required by the operation of the planning software on this basis, and a mathematic foundation is provided for the operation of the software.

The invention provides a method, a device and network equipment for automatic testing. The method comprises the following steps: obtaining smallest logical topology corresponding to testing environment topology and testing script, and link number change identification information between logic equipment in the smallest logical topology, wherein the link number change identification information includes the change information of the link number between the logic equipment in the smallest logical topology along with the testing environment topology, and the change values of the link number; mapping in the testing environment topology according to the smallest logical topology and the link number change identification information and generating global virtual topology; and calling the testing script for testing according to the global virtual topology. When the technical scheme provided by the invention is used for automatic testing, the flexibility and the portability of the testing script can be improved, and the coverage rate of a test port and the execution efficiency for coverage testing can be improved.

The invention provides an openstack platform multi-network-area supporting system and method, and relates to the technical field of cloud computing management platforms. The method includes deployinga plurality of network areas according to the physical topology or the logic topology of the Openstack platform, realizing the data network communication in the plurality of network areas, and settingthe corresponding area attributes for each network area; and determining the network node and the computing node corresponding to each network area according to the set area attributes, wherein the control node divides the network nodes and the computing nodes in the Openstack platform into corresponding network areas according to the area attributes corresponding to each network area. Accordingto the invention, the requirement for physical isolation of the customer on the plurality of areas is met, the capability of distinguishing the network nodes and the capability of providing differentreliability services can be achieved, the matching with the AZ and the HA of the computing nodes is better realized, and a whole set of differentiation service is provided for the user.

Network performance may be improved by adjusting a logical network topology while avoiding attendant disruptions. By identifying an alternative logical topology, routing network traffic away from links that will be eliminated from the alternative logical topology, and updating a traffic routing plan upon the adoption of the alternative logical topology, a network may adopt a more efficient topology without misdirecting network traffic.

The invention provides a method and equipment for selecting a master node of a system. The method provided by the embodiment of the invention comprises the following steps of: determining the logical topology information and resource information of the system; computing access delay parameters between every two adjacent nodes in the system according to the logical topology information of the system, and computing resource weights of each node in the system according to the resource information of the system, wherein the access delay parameters are used for representing distance conditions between every two adjacent nodes, and the resource weights are used for representing the plugin resource conditions of the nodes; computing qualification values of each node according to the access delay parameters and the resource weights, wherein the qualification value is used for representing the distance conditions between one node and the other nodes and the plugin resource conditions of the node; and selecting the master node for the system according to the qualification values. The embodiment of the invention can realize the automatic selection of the master node of the system and solve problems caused by manual selection.

Embodiments of the present invention provide a control method and apparatus for the data stream forwarding route. The parameter information of each data stream and the logical topology of a network used by the method are pre-stored. The method also includes: receiving a forwarding request of the first data stream transmitted by a network device; obtaining the parameter information of the first data stream from the pre-stored parameter information of each data stream; determining the forwarding policy of the first data stream according to the parameter information; the forwarding policy including the quintuple and other communication information of the first data stream; determining the forwarding route of the first data stream in the network according to the forwarding policy of the first data stream and the logical topology of the network; transmitting the forwarding route of the first data stream in the network to the network device. The embodiments of the present invention can improve the flexibility of the forwarding route determination and the network resource utilization ratio.

Aspects extend to methods, systems, and computer program products for configuring a cloud from aggregate declarative configuration data. A declarative language can be used to declare physical and logical topology as well as cloud operations commands at multiple topology hierarchies. Developers of different cloud components can declare roles and cloud operations in compliance with a declaration model. Compliance with the declaration model allows aggregation and cross-referencing among commands and topology elements declared by different developers. As such, dependencies between components can be efficiently identified and accounted for when implementing cloud operation commands. Declarative configuration data can also be used to onboard additional components to a cloud without code changes to an underlying configuration engine.

The invention provides an automated topology dynamic mapping method and an automated topology dynamic mapping system. The automated topology dynamic mapping method includes the following steps that: step 1, all tested apparatuses are connected to a physical switch; step 2, attributes of the tested apparatuses and a physical topology of the tested apparatuses and the physical switch are described; step 3, a logical topology of test cases is described; and step 4, the logical topology of the test cases is mapped to the physical topology. With the method of the invention adopted, a certain number of tested apparatuses are connected with one switch, such that a test bed can be formed; according to the attributes of the tested apparatuses and the physical topology of the tested apparatuses and the physical switch, the logical topology of the test cases is mapped to the physical topology; environments are not required to be built manually among each test case to form a corresponding logical topology; reasonable tested apparatuses are connected with one switch, such that the physical topology required by a certain number of test cases can be provided; environments are not needed to be rebuilt for each test case; and therefore, the efficiency of automated test can be improved.

The invention provides an information center network (ICN) logical topology construction method based on software defined networking (SDN) and belongs to the technical field of the internet. Due to the fact that the ICN framework undergoes fundamental change compared with the TCP / IP framework, the existing network topology structure and ICN flow distribution are not matched, and in order to achieve matching between the topology structure and ICN flow distribution, by means of the method, reconstruction of network logical topology is achieved through a logic closing link mechanism and a logic adding link mechanism. To be specific, firstly, aggregation of a logic closing link is determined in real time through a hidden markov model in a spatial state transition graph which is constructed according to ICN flow distribution and has hidden markov characteristics; secondly, link aggregation and corresponding bandwidth are added through the maximum-flow minimum-cut theorem positioning logic in a weighting directed complex network constructed according to ICN flow distribution. By means of the method, an effective path is provided for further optimization of ICN flow.

The invention discloses a method for managing network topology, which comprises the following steps: abstracting out equipment base classes from network equipment, deriving equipment derived classes from the equipment base classes, and forming an equipment class derivation tree by the equipment base classes and the equipment derived classes; selecting an equipment class on the equipment class derivation tree according to the objective network topology to be described, and instantiating the equipment class to acquire a logical equipment object; configuring an attribute value for the attribute of the logical equipment object acquired through instantiation; and establishing a topological relationship for the logical equipment object finishing attribute value configuration to acquire the logical topology of the mapping objective network topology. The invention also discloses a device for managing the network topology. By adopting the method and the device, the description of the logical topology for the network topology can be simplified, and the level of network topology management can be embodied.

When a failure occurs in a network or in a network apparatus, a connection state of the network is changed. There is provided a network configuration estimating apparatus for knowing logical route information quickly after a failure occurrence in accordance with information collected from network apparatuses, although it is conventionally difficult to know this information quickly. The network configuration estimating apparatus executes: a process of generating network configuration information such as physical and logical topologies from information collected in advance; a process of monitoring a network failure; a process of calculating a network configuration to be estimated after a network failure occurrence, from the network configuration information generated in advance and network failure information; a process of visually displaying the calculated network configuration; and a process of managing history of calculated network configurations.