Telefonaktiebolaget Lm Ericsson (publ)

Stefano Orsi

Roberto Magri

Paolo Debenedetti

Riccardo Ceccatelli

Annamaria Fulignoli

Roberta Daidone

Stefano Parodi

Marcello Morchio

Francesco Cisamolo

A multi-domain telecommunication network may use a blockchain with an activation block to activate a reserved connection path for a service. The network may use a correction block in the blockchain to efficiently and timely perform a crank-back procedure. A management node of a domain of the network may act as an activation miner send activation messages to management nodes of other domains of the network, the management nodes may perform activation for their respective portions of the connection path reserved by the activation block. The management node acting as the activation miner may verify activation of reserved resources and, in case of failure, generate a correction Block to lock the failed resources and to release the resources affected by the crank-back process. Subsequent blockchain decisions and calculations may reflect the actual status of network resources.

Distributed service activation method via blockchain

A communications network remote node having a downstream optical circuit configured to receive downstream, DS, optical signals from an active main node and from a standby main node, the downstream optical circuit switchable between a working mode and a protection mode. Optical receivers are configured to receive the demultiplexed downstream optical signals and output encapsulated downstream client signals. Optical transmitters are configured to receive encapsulated upstream client signals and to transmit upstream, US, optical signals at upstream wavelengths carrying the encapsulated upstream client signals. An upstream optical circuit is configured to multiplex the upstream optical signals carrying the encapsulated upstream client signals and to send the upstream optical signals to both main nodes. Processing circuitry is configured to extract downstream client signals and alignment data from encapsulated downstream client signals and form encapsulated upstream client signals by encapsulating upstream client signals and alignment data.

Optical transport network protection architecture, nodes and method

An indicator system () for optical ports () of a passive optical communications equipment (). The indicator system comprises a plurality of photodetectors () configured to detect an optical signal on the optical ports and a plurality of () configured to indicate on which optical ports an optical signal is detected by the photodetector. The indicator system further comprises a power source () configured to provide power to the photodetectors () and indicators (). The power source is self-contained at the passive optical communications equipment. The power source () comprises a mechanical to electrical converter ().

Optical port identification

A method of identifying a fault in an optical link comprises continually storing samples of a signal that represents a power of an optical signal received over the optical link. When a fault is detected on said optical link, at least one stored series of samples of the signal is retrieved. The method then comprises performing a classification on the retrieved series of samples, in order to classify the series of samples as resulting from one of a plurality of predefined faults.

Fault classification

A method of managing a node in a cluster of nodes in an SDN network. The method comprising receiving from the node a request to join the cluster and a list of references authenticating the node. The references are verified and if the referenced passed the verification the node is allowed to join the cluster. Then a trust level of the node is calculated based on the number of verified references, wherein a role of the node in the cluster depends on the trust level of said node.

Method and apparatus for trust based authentication in SDN clustering

Optical protection switching apparatus (), for a single fibre bidirectional WDM optical ring, comprising: first () and second () ports for coupling to first and second adjacent portions of a single fibre bidirectional WDM optical ring; an optical splitter () comprising an input to receive a WDM aggregate optical signal, and first and second outputs coupled to the first and second ports; an optical switch () between the second output and the second port; and processing circuitry () to receive at least one of an indication of transmission continuity in the optical ring and an indication of transmission discontinuity in the optical ring, and to generate a switch control signal () comprising instructions to cause the optical switch to be open when there is transmission continuity in the optical ring and to cause the optical switch to be closed when there is transmission discontinuity in the optical ring.

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Genoa, Italy

Stefano Orsi