Abstract: The present invention a method of transmitting video information over a communication link made of several transmission paths between wireless transmitting and receiving stations. The method comprises, in the wireless transmitting station, obtaining an uncompressed video frame made of an array of pixel blocks, a pixel in the pixel blocks being represented by base pixel information and enhancement pixel information; generating at least one set of complementary pixel blocks from a given pixel block of the obtained uncompressed video frame, by applying different operations to said given pixel block for dropping different enhancement pixel information from that pixel block, so that the complementary pixel blocks comprise different enhancement pixel information and each comprises the base pixel information; and for each set, transmitting the complementary pixel blocks over respective different transmission paths to the wireless receiving station.

Abstract: There is provided methods for node discovery in a network comprising the following steps: performing a first discovery process for discovering at least one first node of said network, using at least one first wireless communication parameter, adapting said at least one first wireless communication parameter, thereby obtaining at least one second wireless communication parameter coordinated with wireless communication parameters of nodes of at least one group of nodes discovered during the first discovery process, and performing a second discovery process for discovering at least one second node of said network, using said at least one second wireless communication parameter. Embodiments of the invention provide better coordination during node discovery thereby making the node discovery is thus made faster and reducing interferences between the nodes.

Abstract: The present invention relates to a method for managing communications in a wireless communications network having a mesh or “relay-based” communication mode operating according to a relay scheme. The network includes network devices defining transmission links between them. The method includes initially detecting a mobile obstacle within the network coverage area; dynamically tracking the detected obstacle by iteratively determining a monitoring area including the detected obstacle; selecting, from the transmission links, a subset of monitoring links belonging at least partly to the monitoring area and monitoring a perturbation level of the selected monitoring links to determine movement of the mobile obstacle in the coverage area; and dynamically adapting the relay scheme of the network based on the belonging or not belonging of the transmission links between network devices to the selected subset.

Abstract: A method is proposed for managing a distribution of bandwidth in a communications network by means of a slave node of the network, said network comprising a set of nodes. The slave node is such that it performs steps for: determining a coarse representation and a detailed representation of the distribution of the bandwidth in said network, as a function of a piece or pieces of information relative to conditions of transmission in said network and/or relative to applications needs of transmission; receiving a coarse reference representation of the distribution of bandwidth in said network, coming from a master node of said network; comparing said determined coarse representation and said reference coarse representation; should said coarse representations be identical, applying said determined detailed representation; if not, applying said coarse reference representation.

Abstract: The present invention concerns a method and a device of transmitting uncompressed video streams. In particular, the method concerns the adaptation of a wireless transmission to bandwidth reduction and packet loss. There is provided a computer implemented method for sending uncompressed video data, wherein the video data comprises binary video components, the method comprising generating a plurality of SB packets from a group of video components, each SB packet being constituted by bits of the video components grouped according to their significance; determining available bandwidth for transmission and sending the most SB packets to fit the available bandwidth, beginning by the most significant ones, meaning containing the most significant bits of the video components. Accordingly, the best possible quality is obtained according to the available bandwidth.

Abstract: The present invention relates to improving configuration of wireless communication paths between devices in a video projection system comprising multiple wireless video projectors. When an initial radio communication setup is required between a managing node, e.g. a node comprising a master projector, and a node comprising a slave projector, for example following the powering up of the video projection system, the slave node receives setup information by radio communication means according to a sweeping sequence and transmits information by projecting sub-images. Sub-images advantageously comprise information relative to settings of the master node allowing reception in the corresponding slave node of a radio signal transmitted by the master node.

Abstract: A method for managing allocation of paths for transmission, in packets of symbols, of at least a first data content, each content being transmitted from a source node up to a destination node in a meshed communications network comprising a plurality of nodes, each destination node receiving a plurality of copies of a same packet of symbols of the content transmitted to said destination node by a source node, each copy being received by the destination node via a distinct transmission path directly from the source node or via at least one relay node of the meshed communications network, the packets being encoded with an error correction code enabling decoding by erasure of packets symbols.

Abstract: The invention pertains to a method for determining a sequence of access (300) to a communications network (100) by a plurality of nodes (101, 102, 103, 5 104, 107) of said communications network (100) in the context of the broadcasting of a data content by a transmitter node (101) to a set of receiver nodes (103, 107, 104, 102), at least one receiver node (102, 104) having to receive said content by means of another receiver node (103, 107), called a relay receiver node.

Abstract: A method for managing communications in a wireless communications network comprising a set of pairs constituted by a sender device and a receiver device, each of the devices having a determined area of communications coverage, the coverage areas of each pair having a mutual intersection area.

Abstract: The present invention relates to a method for managing communications in a wireless communications network having a mesh or “relay-based” communication mode operating according to a relay scheme. The network includes network devices defining transmission links between them. The method includes initially detecting a mobile obstacle within the network coverage area; dynamically tracking the detected obstacle by iteratively determining a monitoring area including the detected obstacle; selecting, from the transmission links, a subset of monitoring links belonging at least partly to the monitoring area and monitoring a perturbation level of the selected monitoring links to determine movement of the mobile obstacle in the coverage area; and dynamically adapting the relay scheme of the network based on the belonging or not belonging of the transmission links between network devices to the selected subset.

Abstract: The disclosure provides an acknowledgement of data received by a communication device, the data being received by data packets, with each data packet comprising a plurality of data blocks. The communication device determines, for a data packet, a number of data blocks whose data can be processed correctly. The communication device further sends an acknowledgement for at least one data block in the data packet if the number of data blocks whose data can be processed correctly is between a first and a second threshold. The communication device also sends, for the data packet, a piece of information at packet level representing the number of data blocks whose data can be processed correctly if the number of data blocks whose data can be processed correctly is lower than the first threshold or higher than the second threshold.

Abstract: A method is proposed for managing communications in a wireless network in which a first communication is set up or established on a plurality of carriers between a first sender device and a receiver device, the network comprising a set of at least one second sender device for which a second communication has to be established simultaneously with said first communication.

Abstract: Method for managing a distribution of bandwidth in a communications network, corresponding computer-readable storage medium and slave node. A method is proposed for managing a distribution of bandwidth in a communications network by means of a slave node of the network, said network comprising a set of nodes.

Abstract: In a method for securing the transfer of a data stream from a sender device to at least one receiver device, through a network comprising a plurality of nodes connected to one another by a plurality of links, the sender device is connected to an input node in the network and each receiver device is connected to an output node of the network. The method comprises the following steps: a) the transmission of the data stream to the receiver devices through the associated output nodes; b) the informing of the output nodes by the input node that the transmission or maintaining of transmission of the data stream, in clear (i.e.

Abstract: The invention pertains to a method for determining a sequence of access (300) to a communications network (100) by a plurality of nodes (101, 102, 103, 5 104, 107) of said communications network (100) in the context of the broadcasting of a data content by a transmitter node (101) to a set of receiver nodes (103, 107, 104, 102), at least one receiver node (102, 104) having to receive said content by means of another receiver node (103, 107), called a relay receiver node.

Abstract: A method for managing communications in a wireless communications network comprising a set of pairs constituted by a sender device and a receiver device, each of the devices having a determined area of communications coverage, the coverage areas of each pair having a mutual intersection area.

Abstract: A method for managing allocation of paths for transmission, in packets of symbols, of at least a first data content, each content being transmitted from a source node up to a destination node in a meshed communications network comprising a plurality of nodes, each destination node receiving a plurality of copies of a same packet of symbols of the content transmitted to said destination node by a source node, each copy being received by the destination node via a distinct transmission path directly from the source node or via at least one relay node of the meshed communications network, the packets being encoded with an error correction code enabling decoding by erasure of packets symbols.

Abstract: The invention relates to a method for acknowledging data received by a communication device, the data being received by data packets, with each packet comprising a plurality of data blocks. The communication device: determines (E503), for a packet, the number of data blocks whose data can be processed correctly, sends (E509, E510; E515) an acknowledgement for at least one data block in the packet if the number of data blocks whose data can be processed correctly is between a first and a second threshold, and sends (E504, E505, E511, E512, E515), for the data packet, a piece of information at packet level representing the number of data blocks whose data can be processed correctly if the number of data blocks whose data can be processed correctly is lower than the first threshold or higher than the second threshold.

Abstract: A method for the storage of a content from a source device to a storage device, the devices implementing a content protection protocol comprising a phase of exchanging a first encryption key (Kc) associated with a first key computation parameter (Nc).

Abstract: In a method for the restriction of access from a sink device to a content stored in a storage device, a content protection protocol comprises an authentication phase and an encryption key exchange phase is implemented between the storage device and the sink device. The method comprises a prior step for the association of at least one predetermined password with said content and/or said storage device; and the following steps of: a) obtaining at least one piece of access information during the authentication phase; b) obtaining a processing function dependent on said at least one piece of access information (UCPK) and said at least one predetermined password (CPK); c) applying the processing function thus obtained during the authentication phase of the protection protocol, the application of the processing function causing the authentication phase to fail when said at least one piece of access information does not meet a predetermined condition.