Alcatel

Alcatel Lucent

Other

Inria

Ludovic Noirie

Arnaud Bisson

Georg Post

Silvio Cucchi

Denis Penninckx

Amaury Jourdan

Jean-Paul Faure

Nicolas Le Sauze

Emmanuel Dotaro

Franck Bruyere

Fabio Valente

Dominique Chiaroni

Gabriel Charlet

Olivier Audouin

Claude Artigue

Mathieu Boussard

François Dorgeuille

Jean-Claude Jacquinot

Albert Benveniste

Luc Berthelon

Caroline Blaizot

Daniel Kofman

Frederic Cerou

George Moustakides

Sameh Ben Fredj

Maria Manzanedo

Stefano Beccia

Mohamad Jaber

Paulo Goncalves

The invention relates to a method for enabling the discovery of at least one service () matching a discovery request and provided by an object located in a space among interconnected smart spaces. The method comprises:&#x2014;modelling the interconnected smart spaces in an n-level architecture () comprised of lowest-level nodes () representing spaces containing physical connected objects and upper-level nodes (),&#x2014;at each lowest-level node (): clustering services () associated with said physical connected objects into at least one lowest-level service cluster (), aggregating parameters () defining each cluster () into information aggregation, and sending () said information aggregation to parent nodes,&#x2014;at each node () from levelto n: clustering received information aggregation into at least one upper-level cluster (), aggregating parameters () defining each cluster () into local information aggregation, building a cluster matching table based on the local information aggregation and received information aggregation, and sending () said local information aggregation to parent nodes, if any, these steps being performed recursively within each node starting from level, and wherein upon reception at a processing parent node () of the request for a service (), processing the request to forward it level by level to child nodes upon successive matching of the request with the cluster matching table until the request reaches a target lowest-level node () representative of a space containing the object providing the service () matching the request.

Method and system for discovery of services in interconnected smart spaces

A method and apparatus for processing data packets in flow-aware network nodes is disclosed for storing flow data without altering transmission data throughput for a limited cost. The method and apparatus for processing data packets in flow-aware network nodes includes alternate usage of a fast access internal memory and a slower speed access external memory which provides low latency yet comprehensive flow-awareness. The method for processing data packets in flow-aware network nodes is particularly useful for overcoming requiring extensive usage of fast access memory of flow-aware network nodes known in the art.

Method for processing data packets in flow-aware network nodes

A ring optical transmission network access node (ANi) comprises: Such nodes enable the implementation of a passive ring network comprising only one fiber and in which the coupling ratios of the couplers (CW, CP) are optimized for two opposite traffic propagation directions. Application in particular to optical fiber metropolitan access networks, with broken fiber protection device.

Ring optical transmission network access node

To selectively route stand-by packets in input modules to destination output modules via a switching matrix, distributed arbitration functions are executable by successive arbitration cycles. Each cycle comprises: a first phase executable by each input controller to send each output controller requests representative of the quantities of required stand-by packets; a second phase executable by each output controller to determine the quantity of admissible packets depending on the requests; a third phase executable by a central arbitration unit to determine allowed aggregate quantities depending on all the admissible quantities; and a fourth phase executable by each input controller to determine the allowed packet quantities depending on the admissible quantities and of the allowed aggregate quantities.

Packet-switched system for communication network node

A packet-switched communications network (PSN) includes a multiplicity of nodes (Ni) adapted to switch streams of packets benefiting from circuit emulation services, known as CES packets. The network uses a particular method of resynchronizing the CES streams. According to that method, for a CES stream intended to take an associated path (CE) from an ingress node (N) passing through a set of nodes including a subset of nodes adapted to resynchronize CES streams selectively, effective resynchronization of said stream by a node selected from said subset is conditioned by a value representative of the cumulative jitter suffered by said stream as far as that node.

Method of resynchronizing streams benefiting from circuit emulation services, for use in a packet-switched communications network

In order to switch selectively via a packets switching matrix waiting in the input modules (IMi) to address output modules, an arbitration function (CSC) selects by successive cycles, from all the pairs of input and output modules, separate subsets. Each cycle comprises p successive phases (x) associated respectively to p arbitration functions. Processing units (PUi) each execute the p functions, each function acting on three parameters termed 'residual required quantity', 'input capacity' and &#x201c;output capacity&#x201d;, the values of which are related to a single pair and are set at the start of the cycle. Each phase consists of N successive steps (y) associated respectively to said subsets, each step being executed in parallel by the processing units (PUi) in order to calculate by means of the arbitration functions the &#x201c;partial&#x201d; accepted quantity values and to reset the parameters for the next step. Application to telecommunication networks, particularly multiservice.

Packets switching system for telecommunications network node

The switching system includes input modules (IM, IM, IMi, IMn) each connected to a switching matrix () and to a corresponding controller (). Each input module (IMi) organizes packets that it receives into digital data blocks with a fixed size, and makes transfers of these blocks by successive cycles to the matrix (). Each of these blocks is organized into groups of digital data, these groups having corresponding modifiable sizes and being stored according to a predetermined order and associated with the corresponding output ports (OP, OP, OPj, OPn) in the system. Each of these groups is formed of packets to be sent to a single corresponding output port. Any block transfer to the matrix () is accompanied by transmission of information representative of the corresponding sizes of the groups of the transferred block to the said controller (), and the groups of each transferred block are switched to their corresponding destination output ports as a function of this information representing the sizes. This system makes it possible to satisfy service quality criteria applicable to switched packets, while limiting the quantity of data to be exchanged between the input modules and the controller. To be applied to telecommunication networks, particularly multiservice networks.

Packet switching system for a communication network node

To optimize the resources of an optical transmission network using wavelength division multiplexing, assigning carrier frequencies to signals to be transmitted consists in associating N sets of optical frequencies of the comb with N respective ranges of consecutive error rate values, each of the sets comprising frequencies generating a mean error rate in the associated range, defining a measured signal transmission constraint level that is a function of the transmission constraint parameter(s) and may take N distinct values referred to as constraint values, associating the N constraint values in increasing order respectively with the N sets of frequencies in decreasing order of the error rate values of the associated N ranges, assigning any signal to be transmitted a constraint value obtained by applying the measurement, and assigning the signal to be transmitted a carrier frequency belonging to one of the sets of frequencies that is associated with a constraint value at least equal to the constraint value assigned to the signal to be transmitted.

Method of assigning carrier frequencies in an optical transmission network

An optical telecommunications network (), of metropolitan area type, having a ring type core (), and secondary rings (). In each sending access node (), transmitters () for sending information-carrying optical signals use a wavelength belonging to a group of wavelengths dedicated to the secondary ring () to which this sending access node () is connected. In each destination access node (), receivers () are capable of receiving all the wavelengths used by sending nodes () of the network. Communication nodes () comprise all-optical devices () for inserting, into the core fiber (), optical signals sent by a sending access node connected to the communication nodes. Optical couplers (), for taking from the core fiber () a so-called representative signal formed of a fraction of the power of each information-carrying signal, are respectively coupled to the receivers of the destination nodes.

Metropolitan area type optical telecommunications network comprising a ring type core

The present invention relates to a method of monitoring the transmission of optical signals including a step of inserting a monitoring signal (S) more particularly suited to monitoring the quality of service. During the transmission of optical signals each carried by a predefined wavelength defining a transmission channel (C), said signals are grouped onto the same fiber in a band (B) of channels. The method then includes a step of simultaneously modulating said signals grouped in the band of channels using the monitoring signal to be transmitted, so that each of the signals constitutes a carrier of the monitoring signal.

Method and a system for monitoring the transmission of optical signals

A device for processing optical signals comprises sources each delivering, substantially simultaneously, optical signals in accordance with a comb of at least two different wavelengths or a continuum of wavelengths. It further comprises multiplexers adapted to deliver to at least one primary port a multiplex of channels corresponding to chosen bandwidths produced from optical signals received at secondary ports each provided with selective spectral filters adapted to pass optical signals whose wavelengths belong to one of the bandwidths corresponding to one of the channels of the multiplex. It further comprises optical routers for routing the optical signals delivered by the sources to secondary ports of the first multiplexers as a function of instructions received.

Configurable optical signal processing device with wideband sources

A reconfigurable directional optical system comprises N ports that can be configured individually as inputs or outputs. A system of this kind comprises at least one optical device having unidirectional inputs and outputs the total number of which is equal to or less than N, and an N&#xd7;N optical switch such that each of the ports can be coupled interchangeably either to one of the inputs or to one of the outputs of the optical device.

Reconfigurable directional optical system

The invention relates to a time division and wavelength division multiplex optical switching node for use in an optical communications network (), which node combines a set of time division multiplex packets (---i) into a wavelength division multiplex packet () to form a composite wavelength division multiplex packet, in particular by conferring on each time division multiplex packet (---I) a respective appropriate multiplexing wavelength (&#x3bb;, . . . , &#x3bb;i), for example a wavelength specific to each time division multiplex packet. The invention has applications in high bit rate optical networks in particular, in which it offers versatility and transparent use of the different multiplexing modes.

Time division multiplex and wavelength division multiplex optical switching node

A switch for an optical transmission network using wavelength division multiplexing has pinput ports receiving pwavelengths and first switching means for switching the pwavelengths to poutput ports, qinput ports receiving qbands of wavelengths and second switching means for switching the qbands to qoutput ports, rinput ports receiving rgroups of bands and third switching means for switching the rgroups of bonds to routput ports. The three switching means consist of a single switching matrix adapted to couple any of the p+q+rinput ports to any of the p+q+routput ports. This single-matrix architecture can switch all the granularities at the same time, which facilitates reconfiguration as a function of evolution of the traffic to be switched.

Switch for an optical transmission network using wavelength division multiplexing

A method is disclosed of reconfiguring a ring optical network made using a single optical fiber ( ). A traffic concentrator ( ) and stations ( ) are optically connected to the fiber. The concentrator sends a light signal to and receives a light signal from both ends of the fiber using two groups of wavelengths ( ) in order to be able to communicate with all the stations. When the network is established, a virtual break ( ) is created between two stations. If a real break is detected in the optical fiber, then the virtual break is shifted until it coincides with the real break, thereby enabling traffic to be re-established between the concentrator and the stations. Each station is equipped with a three-state optical switch ( ) for changing the direction of the light signals.

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Nozay, France

Ludovic Noirie