Telefonaktiebolaget Lm Ericsson (publ)

Carla Marcenaro

Massimiliano Maggiari

Michela Bevilacqua

Francesca Bruzzone

The present invention relates to a method of and apparatus for configuring a link in a label switching communication network. The method implemented in a network node comprises determining formation of a communication link between the network node and another network node and sending link formation information to a link manager. The method further comprises receiving link configuration information for the communication link from the link manager and configuring the communication link in response to the received link configuration information.

Method of and apparatus for configuring a link in a label switching communication network

A Carrier Ethernet network comprises nodes connected by links. The network supports connectionless traffic flows between nodes. A network management system performs a method comprising: determining when an event has occurred in the network which may change bandwidth usage on a link of the network; determining traffic flows which use the link; determining a total bandwidth demand of the traffic flows using the link; and comparing the total bandwidth demand with a bandwidth capacity of the link. Determining when the event has occurred can include at least one of: receiving an alarm indicating a network fault; receiving a topology change indication from a node of the network.

Monitoring carrier ethernet networks

There is provided a method for optimizing the configuration of an optical network which is adapted to transport optical traffic along a path from a source node to a destination node, wherein the path can be routed via any one or more of a plurality of intermediate nodes in the optical network. The method comprises the steps of receiving an operating parameter of an optical device monitored in a plurality of nodes. The received operating parameter is compared with a threshold value. An operating status of a node is determined based on the comparison of the received operating parameter with the threshold value. The determined operating status of a node is used as a routing criteria for computing a path for routing traffic through the optical network.

Apparatus and method for optimizing the reconfiguration of an optical network

A network management system manages preplanned alternative paths in a wavelength switched optical network for a traffic flow having a working path and two or more preplanned alternative paths from a source node to a destination node. A processing part determines if, after the fault, a number of available alternative paths for the respective traffic flow drops to a threshold. If so, a new alternative path is calculated and set up the new alternative path in the nodes, to enable one or more of the nodes to move the traffic flow onto the new alternative path in the event of further faults without waiting for input from the network management system. Thus multiple faults can be handled without the nodes needing to store details of so many such alternative paths. Otherwise, many such alternative paths are needed to take account of many different possible failure locations.

Adding new alternative paths for restoration in WSON network

A network management node of a connection-oriented network listens to topology advertisements in a control plane of the network and stores information carried in the topology advertisements. The node selectively sends Link Management Protocol (LMP) requests based on the information carried in the topology advertisements. The LMP requests can be performed for at least one of the following events: adjacency addition; addition of a link between nodes; deletion of a link between nodes; modification to the bandwidth of a link between nodes. The information collected in the topology advertisements is translated into a format compatible with an Operations Support System (OSS) model.

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Genoa, Italy

Carla Marcenaro