Canon Kabushiki Kaisha

Canon Europa N.v.

Alain Caillerie

Lionel Tocze

Yacine El Kolli

Isabelle Morvan

Claude Le Dantec

Pascal Rousseau

Anne Abiven

Mounir Achir

Bernard Revillet

Patrice Nezou

Philippe Le Bars

Pascal Lagrange

Pierre Visa

Mickaël Lorgeoux

Julien Sevin-Renault

Fran&ccedil;ois Delumeau

Mikael Lorgeoux

Sylvain Becot

St&eacute;phane Gouache

A method of configuring a beam forming antenna in a communication network that comprises a first node where the beam forming antenna is located, second nodes and at least one destination node, communication links being established between said first node and said at least one destination node through at least some of said second nodes. The method comprises: emitting a signal by the beam forming antenna configured with a first set of antenna parameters; the same signal being sent from the first node to several second nodes; obtaining, for a plurality of communication links through which the signal has been sent, at least one physical magnitude representing the distortion caused by each communication link to the signal; aggregating said physical magnitudes of said plurality of communication links; and obtaining a second set of antenna parameters for configuring the beam forming antenna in accordance with said aggregated physical magnitudes.

Method and a system for configuring a beam forming antenna in a communication network

A method and device for decoding a plurality of packets of same data. Each packet is encoded using a product code. An encoded packet comprises data blocks is organized into rows and columns. Each of the rows and columns has a respective error detecting code. For a data packet, Erroneous row and column data are detected by their associated error detecting code. In the data packet, a potentially erroneous data block belonging to a row and a column of data blocks both having been detected as erroneous is detected. In another data packet of the same data, a non-erroneous data block corresponding to the identified potentially erroneous data block is determined. The data block is determined as non-erroneous if it belongs to at least one row or column of data having been detected as non-erroneous. The identified potentially erroneous block is replaced with the determined non-erroneous block.

Method and device for processing received data

A method of transmitting a video frame over a plurality of communication channels involves selecting a number of communication channels available between the transmitting and the receiving devices; partitioning spatially correlated pixels of the video frame into a number of different partitions equal to the number of selected communication channels; and transmitting the different partitions, where each partition is transmitted on a distinct communication channel among the selected communication channels. Such a method is suitable for use in a communication system, especially a wireless communication system, in which data of a channel can be lost or corrupted. The method can maximize diversity in the transport of the video frame pixels and improve robustness.

Communication of video information

A method is proposed for transmitting at least two data contents by means of a source node to a destination node via at least two transmission paths. The method for transmitting includes steps of: sub-dividing each content into a succession of elementary data groups according to a predetermined pattern of repetition comprising at least two types of different elementary groups; transmitting elementary groups on at least one of the paths, according to a predefined alternation of elementary groups resulting from the sub-division of at least two different contents.

Methods for transmitting and receiving data contents, corresponding source and destination nodes and storage means

Methods and apparatus for communicating between a first node and a plurality of second nodes in a network, including a first uplink mode in which a first message is transmitted from multiple second nodes in sequence, and a second uplink mode in which a second message is sent from only a subset of nodes. A first receiving node evaluates communication path information based on messages received in the first uplink mode and returns this information via an acknowledgement to allow the subset to be selected. The first message from multiple nodes includes sequence information to allow the first node to acknowledge at an appropriate point in time. This is particularly applicable where multiple spatially separated antennas offer a receiver several observations of the same signal in an antenna diversity scheme.

Communication method and apparatus

A method includes emitting a reference signal following K transmission paths during a first configuration time slot, identifying valid transmission paths among the set of K transmission paths by listening, according to each transmission path of the set, for a feedback reference signal from the second device during the second configuration time slot; and emitting data signals in each communication time slot of which the associated transmission path has been identified as valid.

Methods and devices for transmitting and receiving data signals in a wireless network over a plurality of transmission paths

It is proposed a method for selecting an effective angle of reception of a directional antenna of a receiver node, the receiver node belonging to a wireless communications network comprising a plurality of emitter nodes. The method is implemented by the receiver node and comprises steps of:

Method for selecting an effective angle of reception of a directional antenna of a receiver node, corresponding storage means and receiver node

Methods for configuring antennas of first and second nodes of a wireless communications network clocked by transmission cycles, each cycle being divided into time slots, the first node and second nodes having first and second time slots for transmitting data in the first mode, the first node having a third time slot for transmitting data to the second node in a second mode, are proposed. The configuring method, on the second node side, comprises steps of determining a receiving configuration of the antenna of the second node, verifying that the determined receiving configuration is invariant, relative to a receiving configuration previously used for receiving data transmitted from the first node to the second node in the second mode; in the event of negative verification: sending a predetermined signal in the second mode, by using a sending configuration that is determined based on the determined receiving configuration; configuring, during the third time slot, the antenna of the second node by using this determined receiving configuration.

Methods for configuring sender and receiver antennas, corresponding storage means and nodes

The invention pertains to a method for determining a sequence of access () to a communications network () by a plurality of nodes () of said communications network () in the context of the broadcasting  of a data content by a transmitter node () to a set of receiver  nodes (), at least one receiver node () having to receive said content by means of another receiver node (), called a relay receiver node.

Method for determining a sequence of access to a communications network, corresponding computer program product, storage means and devices

The communication method concerns communication stations adapted to communicate with each other when a base station supplies a synchronisation signal to mobile stations synchronising on this signal. This method includes a request operation () during which a first base station () transmits, to a mobile station (), a request for the storage in memory and transmission, by said mobile station, of a message, to a message destination communication station () which is not synchronised with said first base station.

Method and device for communicating a message on a network and systems using them

The communication method concerns communication stations adapted to communicate with each other when a base station supplies a synchronisation signal to mobile stations synchronising on this signal. This method includes a request operation during which a first base station transmits, to a mobile station, a request for the storage in memory and transmission, by the mobile station, of a message, to a message destination communication station which is not synchronised with the first base station.

The communication method of the invention applies to communication stations adapted to communicate with each other when at least one of said communication stations supplies a control signal, said station then functioning in 'base station' mode and the stations not supplying a control signal then functioning in 'mobile station' mode. The method of the invention includes, for at least one communication between two communication stations functioning in mobile station mode, in connection with a first base station:

Method and device for communication on a network

Switching communication modes in a network

For coding and decoding data, the data to be coded and the decoded data being stored in a memory ( ), a single data coding and decoding means ( ) is used. The coding and decoding means is initialised in coding mode, and the passage of data to be coded from the memory ( ) to the coding and decoding means ( ) is controlled, or the coding and decoding means is initialised in decoding mode, and the input of coded data into the coding and decoding means ( ) and the passage of decoded data from the coding and decoding means to the memory ( ) are controlled.

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Rennes, France

Alain Caillerie