Telefonaktiebolaget Lm Ericsson (publ)

Other

Ghani Abdul Muttalib Abbas

Sergio Lanzone

Orazio Toscano

Scott Andrew Mansfield

Philip Andrew Arnold

John Ash

A method of transporting a client signal across an optical transport network (OTN) comprises dividing a received client signal into a plurality of parallel signals at a lower bit rate. The parallel signals are mapped into a respective number of optical data units (ODUs), each ODU having payload bytes and overhead bytes. Each ODU is mapped into a respective optical transport unit (OTUs) having payload bytes and overhead bytes. The OTUs are transmitted across respective optical carriers. Optical channel control information is inserted into the overhead bytes of the ODU and/or OTU. The optical channel control information is used to request a change in the optical carriers used to transport the client signal.

Method and apparatus for transporting a client signal over an optical network

A Layer 1 transport network, such as an Optical Transport Network (OTN), transports traffic in Layer 1 data transport units. Traffic received at a node of the transport network is mapped to Layer 1 data transport units according to destination such that each Layer 1 data transport unit carries traffic for a particular destination of the transport network. The Layer 1 transport network can carry a plurality of different traffic types and the node can map the received traffic to Layer 1 data transport units according to destination and traffic type. Identification information can be added to an overhead section associated with the Layer 1 data transport unit to indicate at least one of: traffic type and destination of the traffic carried within the data transport unit. At a subsequent node, the Layer 1 data transport units are received and switched such that Layer 1 data transport units carrying traffic destined for other nodes bypass higher layer processing at the node and Layer 1 data transport units carrying traffic destined for the node are switched to a local output of the node.

Traffic differentiation in a transport network

A node for a communications network has a converter for digitizing at a receiver clock rate a received optical signal received over an optical link from an optical transmitter at a source node, a framer for detecting frames and a forward error correction part for correcting errors in the payload of the frame. An error rate in the received payload part is monitored and a processor sends, according to the monitored error rate, a request to the optical transmitter to adapt a length of the transmitted forward error correction part and to adapt a clock rate of the transmission of the frame if FEC length is reduced or FEC is disabled. This can enable power saving, when less FEC information is being sent.

Communications network using adaptable FEC

A methodof transmitting traffic in a communications network. The method comprises receiving client signal having a client bit rate and comprising traffic to be transmittedand monitoring an indicator indicative of said client bit rate. The method further comprises setting a transmission bit rate at which to transmit the traffic. The transmission bit rate is set in dependence on said client bit rate. The method further comprises generating and transmitting a control signal arranged to cause a transmission apparatus to transmit the traffic at the transmission bit rate

Method of transmitting traffic in a communications network and communications network apparatus

A method of configuring a network element in a transport network comprising interrogating components of the network element about their characteristic and exchanging information on characteristics of the network element and its components with neighboring network elements. The network element is configured based on the exchanged information.

Self-configuring transport network

A method of transporting a client signal across an optical transport network (OTN) comprises dividing a received client signal into a plurality of parallel signals at a lower bit rate. The parallel signals are mapped into a respective number of optical data units (ODUs), each ODU having payload bytes and overhead bytes. Each ODU is mapped into a respective optical transport unit (OTUs) having payload bytes and overhead bytes. The OTUs are transmitted across respective optical carriers of a super-channel, the optical carriers of the super-channel being synchronously modulated. Optical channel control information is inserted into the overhead bytes of the ODU and/or OTU. The optical channel control information is used to manage and/or control the transport of the client signal using the super-channel.

Growing community of inventors

Nottingham, United Kingdom

Ghani Abdul Muttalib Abbas