1456 results about "Topology information" patented technology

A system, method and device for providing a power line communication system via an ad hoc network protocol is provided. In one embodiment, the method includes transmitting and receiving Alive Notifications via a power line. Each Alive Notification may include data identifying an interface of the transmitting power line node and information identifying an interface of one or more other power line nodes from which the transmitting node has previously received an Alive Notification and reliability information all such nodes. The method may further include regularly transmitting and receiving topology information and routing information via the power line and updating topology and routing information in memory. The method may further include selecting a route to a network for transmission of data based on the routing information stored in memory, wherein the selected route includes the fewest hops and satisfies reliability requirements. The method may further include identifying a first power line node that comprises the first hop of the selected route and transmitting data to the first power line node.

A data distribution method is disclosed which can realize autonomous or private data distribution between user terminals in a network environment such as the Internet. In this method, the respective nodes exchange topology information indicating a connection relationship between upstream nodes and downstream nodes, and relay stream data from the upstream nodes to the downstream nodes. Each node arbitrarily separates from the network and connects to an upstream node in accordance with a predetermined condition.

A system for reducing the cost of network managment by using a proxy agent and subchannel communications so fewer SNMP licenses and fewer protocol stacks are needed. Subchannel communication is achieved in a plurality of different embodiments. Embodiments having single subchannel transceivers, multiple transceivers, single multiplexer and multiple multiplexers are disclosed. An NMS process using routing table CRC to automatically detect when the NMS topology information is incorrect and automated topology discovery is disclosed. A process for automated discovery of redundant cables during automated topology discovery is disclosed.

A communication network comprises a plurality of nodes interconnected by communication links. A node maintains a database of topology information relating to the network. A node receives a topology advertisement from another node of the network which provides information about a part of the network. The topology advertisement includes a metric which is related to aggregate distance or cost of the path travelled by the topology advertisement. The node compares the metric in the newly received topology advertisement with one previously received for the same part of the network. The database is updated with the newly received topology advertisement if the value of the metric in the newly received topology advertisement is lower than the metric in the topology advertisement previously received for the same part of the network. The method can be used during flooding or database synchronisation. The metric can be carried within a header or body of a topology advertisement, such as a Link State Advertisement (LSA).

A path control device includes a TE database and a local database for storing topology information showing states of use of links in a network, a topology information collection unit collecting the topology information of the respective communication nodes therefrom and updating the TE database by the topology information, a path solution unit determining a path of the network referring to the local database, an internal update unit recognizing a link included in the determined path and updating a local database by information as to said link, and an update determination unit matching the topology information of both the databases by comparing both the databases.

Certain exemplary embodiments comprise a method comprising a plurality of activities, comprising: for each of the plurality of routing entities in an AS: obtaining IGP topology information; learning available BGP routes associated with the routing entity; utilizing the available BGP routes and the IGP topology information for all routing entities in the AS, assigning the routing entity a customized routing decision comprising a BGP route; and sending the customized routing decision to the routing entity.

A topology discovery process is used to discover all of the links in an ad hoc network and thereby ascertain the topology of the entire network. One of the nodes of the network, referred to as the coordinator, receives the topology information which can then be used to, for example, distribute a routing table to each other node of the network. The process has a Diffusion phase in which a k-resilient mesh, k>1, is created by propagating a topology request message through the network. Through this process, the nodes obtain information from which they are able to discern their local neighbor information. In a subsequent, Gathering phase, the local neighbor information is reported upstream from a node to its parents in the mesh and thence to the parents' parents and so forth back to the coordinator. The robustness of the Diffusion phase is enhanced by allowing a node to have more than one parent as well as by a number of techniques, including use of a so-called diffusion acknowledgement message. The robustness of the Gathering phase is enhanced by a number of techniques including the use of timeouts that ensure that a node will report its neighbor information upstream even if it never receives neighbor information from one or more downstream neighbors and the use of a panic mode that enhances the probability that a node will get its neighbor information, and its descendents' neighbor information, reported upstream even if that node has lost connectivity with all of its parents.

A method and apparatus are provided for monitoring the physical topology of a network on a real-time basis. For patch panel systems, the approach is based upon a distributed architecture that may be modularly scalable and may allow each patch panel to determine port level connectivity by independently monitoring an out-of-band channel supported by each respective port. The approach provides improved real-time reporting of patch panel connectivity with reduced cabling complexity, increased reliability and decreased maintenance costs. The approach is capable of determining the physical equipment and/or physical location information associated with the respective patch panel ports, in real-time, and thereby provide physical network topology information associated with patch cord connections. The approach is compatible with multipurpose network management systems.

To provide a technology of easily conducting a route design for efficiently accommodating user traffic. On the occasion of designing a communication route between user sites in a network management device connecting to a relay node in a network that connects a plurality of user sites to each other through a plurality of relay nodes and links, there is accepted an input of user information containing information about bandwidth of an access link serving as a link for connecting each of the user sites to the relay node, and information showing the relay node connecting to the user site via the access link, topology information of the network for relaying the communications between the user sites is acquired, a communication relay port and a communication non-relay port are obtained based on the user information and the topology information, an upper limit of the communication bandwidth available for the user on the communication relay port is obtained, a route design so that the user sites are connected by a tree-shaped route is performed, and a result of the route design is outputted.

The invention discloses a distributed network control method. A plurality of controller nodes form a distributed controller network, and each controller node manages one or more pieces of switch equipment. The method comprises the following steps that: the controller node receives information reported by a switch, synchronizes network topology change information in the information among all the controller nodes, and stores host position information in the information into a distributed control network; and when receiving a data stream processing request, the controller node queries the destination address information of a data stream from the distributed controller network, and establishes a data exchange path for the data stream according to locally stored global network topology information. The invention also provides a distributed network control device. According to the technical scheme, the problem of performance bottleneck of a network controller can be solved.

A topology information system, comprising a topology collection sub-system, a topology database, a topology query sub-system and a topology correlation sub-system. The topology collection sub-system includes at least one topology discovery agent. The topology collection sub-system automatically collects topology information from at least one topology layer of at least one managed world. The topology database is adapted to store the topology information collected by the topology collection sub-system. The topology query sub-system is adapted to query the topology information stored in the topology database using a topology pattern query created by a user. The topology correlation sub-system operates in parallel to the topology query sub-system, constantly monitoring the managed world for events and updating the Information Base accordingly.

One embodiment of the present invention provides a system that identifies network switches along a path. During operation, the system receives an address of a source node and an address of a destination node. The system maintains a set of topology information for a network. The system further simulates a data packet originated at the source node and destined for the destination node. During the simulation, the system determines whether a current-hop node performs layer-3, layer-2, or sub-layer-2 switching. The system sends a query to the current-hop node over a separate control channel to determine the status of the current-hop node and discover a next-hop node. The system then receives a reply. The system determines the next-hop node based on the reply and sets the next-hop node as the current-hop node.

A method and apparatus are provided for monitoring the physical topology of a network on a real-time basis. For patch panel systems, the approach is based upon a distributed architecture that may be modularly scalable and may allow each patch panel to determine port level connectivity by independently monitoring an out-of-band channel supported by each respective port. The approach provides improved real-time reporting of patch panel connectivity with reduced cabling complexity, increased reliability and decreased maintenance costs. The approach is capable of determining the physical equipment and/or physical location information associated with the respective patch panel ports, in real-time, and thereby provide physical network topology information associated with patch cord connections. The approach is compatible with multipurpose network management systems.

A geographically distributed storage system including a global Peer-To-Peer (P2P) ring and a local P2P ring. The global P2P ring includes all storage nodes and the local P2P ring includes a group of the storage nodes. Each of the group of storage node belongs to the global P2P ring and the local P2P ring and each storage node includes global and local management information. The global management information includes a node table for managing topology information of a network connecting the group, a metadata table for managing locations of stored data objects, and a global routing table for managing routing in the global P2P ring. The local management information includes an object management table for managing stored data objects in the group, a Logical Unit (LU) management table for managing logical units in the group and a local routing table used for managing routing in the local P2P ring.

A system for reducing the cost of network managment by using a proxy agent and subchannel communications so fewer SNMP licenses and fewer protocol stacks are needed. Subchannel communication is achieved in a plurality of different embodiments. Embodiments having single subchannel transceivers, multiple transceivers, single multiplexer and multiple multiplexers are disclosed. An NMS process using routing table CRC to automatically detect when the NMS topology information is incorrect and automated topology discovery is disclosed. A process for automated discovery of redundant cables during automated topology discovery is disclosed.

The solutions offered herein include introducing a mediator in the codec: negotiation process. Rather than having the endpoints negotiate codecs directly, the mediator receives signaling from the endpoints relating to the establishment of a communication session which requires codec negotiation, and influences the selection of a codec based on codec policy criteria which depends on known topology information.

A method and system for integrated management of converged heterogeneous resources is disclosed. The method includes: defining a Software-Defined Infrastructure (SDI) by separating data, control, and management for converged heterogeneous resource provisioning, creating an integrated resource manager using interfaces for one or more cloud controllers, Software-Defined Network (SDN) controllers, or general-resource controllers, enabling external entities to request and use the resources through interfaces, storing topology information and utilizing it for integrated resource management, and monitoring and measuring the converged heterogeneous resources. An integrated management system includes an SDI manager configured to provide integrated resource control and management functions, a cloud controller, an SDN controller, a general resource controller, a topology manager, northbound interfaces of an SDI manager for external entities to request resources and check the status of resources, and all inter-relations between an SDI manager, a cloud controller, an SDN manager, a general resource manager and a topology manager.

A method and apparatus is disclosed herein for performing multi casting. In one embodiment, the method comprises receiving routing, association, relaying, and/or topology information associated with a plurality of nodes in a multi-hop wireless network, the plurality of nodes communicably coupled in a tree or mesh arrangement via a plurality of broadcast channels; and determining a subset of the plurality of nodes over each broadcast channel on the multi-hop wireless network that is responsible for sending acknowledgment information, in response to receipt or lack of receipt of transmissions, back to senders of transmissions.

The present invention relates to a point-to-multipoint traffic routing method that routes a multicast traffic through a determined tree on an MPLS network. A node on an MPLS network conducting a point-to-multipoint traffic routing method receives a message with an object including topology information on a determined tree, determines whether itself is a copy node or not based on the topology information, and copies, if determined to a copy node, the received message to transmit to at least two nodes specified as next by the topology information. The present routing method ensures smooth operations of a copy and a merge node as well as an overall network.

A methods of implementing event based distributed multicast flow accounting are presented. Multicast-enabled routers request, and aggregate traffic flow measurement information from downstream multicast-enabled routers participating in dependent multicast sub-trees. Records are kept by the multicast-enabled router regarding changes to the underlying multicast tree topology. The aggregate traffic flow measurements and topology information are reported to multicast-enabled routers upstream. Advantages are derived from the ability to accurately compute multicast content transport costs within a communications service provider's network.