Alcatel

Alcatel Lucent

Alcatel N.v.

Alberto Lometti

Silvano Frigerio

Silvio Cucchi

Luca Gabriele Razzetti

Giovanni Traverso

Alberto Bellato

Paolo Rossi

Marisa Treu

Giulio Gladiali

Marco Lenti

Claudio Colombo

Primo Garofoli

Giuseppa Licata

Stefano Gastaldello

Jean-Francois Jamond

Sergio Cabrini

Alessandra Rossi

Claudio Girardi

Pedro Cameirao

Roberto Cardillo

Laurent Keuer

A method of processing a digital signal for transmission is provided comprising digital data frames, by compressing the digital data frames; and generating an optical data unit for transmission comprising multiple of the compressed digital data frames. The optical data unit is configured for transport by an Optical Transport Network, OTN.

Method of processing a digital signal for transmission, a method of processing an optical data unit upon reception, and a network element for a telecommunications network

A multi-service transport apparatus for integrated transport networks that may have an electrical matrix, termination function means handling signals incoming at said apparatus input, a plurality of termination function means interfacing different layers, and adaptation function means. The termination function means handling incoming signals are implemented in input/output port devices; the termination function means interfacing different layers and said adaptation function means are implemented in adapter devices. The matrix performs exclusively the switching of the incoming signals that are already terminated and adapted by said input/output port devices and by said adapter devices and it is transparent with respect to the signal format. The switch may have a time division multiplexing matrix provided with a number of matrix inputs and a number of matrix outputs; source address generators, connected to matrix outputs of the time division multiplexing matrix.

Multi-service transport apparatus with switch for integrated transport networks

The present invention provides for a method and apparatus for carrying out connection and related input/output processing functions in a Sinchronous Digital Hierarchy (SDH/SONET) transport node (network), in which the payload switching matrices (e.g. MSPC and HPC matrices for an High Order VC system) collapse into one single functional block (MTRX), while the Virtual Container (VCs) monitoring functions (HVC_RX, HVC_TX) are shifted to the Input/Output position of the matrices.

Method and apparatus for carrying out connection and related input/output processing functions in a synchronous digital hierarchy transport node

A method and device is described for converting an STM-signal into a sub-STM-signal in synchronous radio transmission. The invention provides for the use of a pure regenerator network element without any multiplexing function. The method according to the invention provides in transmission, for reducing the received STM-signal by one third (only the first TUG-is considered as valid and is transmitted in the radio link, whereas the second and the third TUG-are considered in an unequipped condition and are not transmitted), thus maintaining the STM-structure. In reception, the method provides for reconstructing the signal with the complete regenaration of the payload and the correct structure of the AU-without incurring any parity control infringement.

Method and device for converting an STM-1 signal into a sub-STM-1 signal and vice-versa in radio transmission

A method and circuit are described for improving the pointer processing in the case of synchronous digital hierarchy (SDH) or synchronous optical network (SONET) transmission frames with VC4_4c, VC4_16c and VC4_64c concatenated payloads. The technique proposed by the existing Standards provides for two different state diagrams to be used in the pointer processing algorithm. One state diagram is used in the case of a concatenated payload and the other state diagram is used in the case of a non-concatenated payload. However, no solution is disclosed for automatically going from the states of one diagram to the states of the other diagram. The present invention provides a circuit so constructed that it can be used in an apparatus processing STM-4, STM-16 and STM-64 frames, through which the automatic recognition of the VC4-4c, VC4-16c and VC4-64c payload concatenation can be achieved. Therefore, it is not necessary to configure in advance the concatenation or non-concatenation condition.

Method and circuit for improving the pointer processing in synchronous digital hierarchy (SDH) transmission frames

A method and circuit for mismatch detection in SDH-coded frame trace identifiers within a telecommunication network, wherein received trace identifiers are compared with expected trace identifiers in determined locations of the communication network, to detect if a misconnection event has occurred and generate a corresponding alarm signal. The method comprises the steps of: a) validating the received trace identifier (TI) and issuing a corresponding validation signal (CRC , CNST); b) comparing the received trace identifier (TI) with an expected trace identifier (ETI) and issuing a corresponding validation signal (MTC , MTC ); c) evaluating the validation signal (CRC , CNST) and the match signal (MTC , MTC ); and d) generating a matching state signal (SVAL , SVAL ) according to the result of the evaluation as per step c), wherein steps a) and b) are executed in parallel.

Mismatch detection in SDH frame trace identifiers

The invention relates to a method and circuit arrangement for the realization of the Higher Path Adaptation (HPA) function in Synchronous Digital Hierarchy (SDH) equipment. Such function serves to equalize frequency difference between the synchronisms of signals coming from different nodes of the network. The equalization is carried out through the use of the positive and negative justification technique. The invention, through the alteration of the justification instants, is capable of reducing the capacity of the elastic storage and the generated wander.

Method and circuit arrangement for the realization of the higher path

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Merate, Italy

Alberto Lometti