Abstract: The present invention regards Cooperative Intelligent Transportation Systems, C-ITS. In response to detecting at least one situation involving at least one object detected within an area monitored by the ITS, a Collective Perception Message, CPM, is generated and transmitted. The CPM comprises a reference to the at least one object and an indication to indicate that the at least one object is involved in the at least one situation.

Abstract: A communication method for an Intelligent Transport System (ITS) comprising at least one first transmitting ITS station, the method taking place at the first transmitting ITS station including transmitting a second Collective Perception Message (CPM) comprising at least one identifier of a first element previously transmitted in a first CPM, the first element being not present in the second CPM.

Abstract: A method of communication in an Intelligent Transport System, ITS, comprising, at an originating ITS station reporting in a collective perception message an element describing a space representing a specific area of a road topology.

Abstract: A Cooperative Intelligent Transportation Systems, C-ITS. A single DENM, i.e. a warning message announcing a detected event such as an accident/collision or a risk of collision or a pre-crash situation, conveys information about multiple objects involved in the detected situation, in particular about the critical objects involved in the collision. The originating ITS station, ITS-S, quickly builds the DENM because containers describing the objects it perceives are already built in a so-called Local Dynamic Map or Environment Model. On the other side, the receiving ITS-S involved in the detected event obtains more information from the single DENM, compared to known technics (CAMs or CPMs). It can then perform a quicker analysis of the situation and then decide earlier to activate or not anti-collision or pre-crash functions.

Abstract: The present invention concerns a method of encapsulating subpicture bitstreams in at least one media file, the subpicture bitstreams corresponding to encoded media data of a subpicture corresponding to a rectangular region of video data, the method comprising: obtaining the plurality of subpicture bitstreams; encapsulating each subpicture bitstream in a subpicture track; generating at least one base track referencing at least two subpicture tracks and forming a spatial arrangement of the at least two subpicture tracks; generating information describing APS referenced by samples of the at least two subpicture tracks; encapsulating the subpicture tracks, the at least one base track and the information describing APS in the at least one media file.

Abstract: A method of synchronization of a communication device comprising a first and second communication ports, each of the first and second communication port being associated with a respective first and second time system, the method comprising a regular master synchronization process synchronizing regularly the first time system with an external synchronization server according to a time synchronization protocol; a regular slave synchronization process synchronizing regularly the second time system with the first-time system; detecting a loss of synchronization between the first and second time system; determining which of the first and second time system is desynchronized; and synchronizing the desynchronized time system with the other one.

Abstract: The present invention relates to a method for generating control signals for an image capture device, the method being performed in a communication device comprising a first slave time generator and a second slave time generator, the communication device being connected to a first remote time server and a second remote time server, the method comprising: synchronizing the first slave time generator with the first remote time server; synchronizing the second slave time generator with the second remote time server; generating a first control signal based on the first clock, and sending the first control signal to the image capture device; and upon detecting a loss of synchronization between the first slave time generator and the first remote time server, generating a second control signal based on the second clock, and sending the second control signal to the image capture device.

Abstract: A method of synchronization of a communication device comprising a first and second communication ports, each of the first and second communication port being associated with a respective first and second time system, the method comprising a regular master synchronization process synchronizing regularly the first time system with an external synchronization server according to a time synchronization protocol; a regular slave synchronization process synchronizing regularly the second time system with the first-time system; detecting a loss of synchronization between the first and second time system; determining which of the first and second time system is desynchronized; and synchronizing the desynchronized time system with the other one.

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 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.

Abstract: 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.

Abstract: A video projector, a cluster of video projectors and a method for wirelessly transmitting image data within the cluster of video projectors. The video projector includes a first antenna located at a first side of the projector and a second antenna located at a second side of the projector, opposite to the first side. Image data is divided into sub-parts, and distributed by assigning each image data sub-part to a video projector. A video projector receiving image data sub-parts extracts and stores the image data sub-part assigned to it, and retransmits image data sub-parts assigned to respectively a second and third video projectors.

Abstract: 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.

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: A method is proposed for managing access to a communications network clocked in transmission cycles by a master node characterized in that, during a given transmission cycle, a slave node of the network performs steps for: obtaining (705) an active access sequence applicable for the given transmission cycle and a piece of information on duration of relevance associated with the active access sequence obtained; carrying out (740) a first check that at least one packet is received by the slave node during the given transmission cycle, according to the active access sequence; in the event of a positive first check, determining (745, 725, 730, 740) an access sequence for a following transmission cycle as a function of pieces of information contained in the received packet or packets; in the event of a negative first check, determining (725, 727, 710, 715, 720, 750, 755) an access sequence for the following transmission cycle as a function of the piece of information on duration of relevance associated with the ac

Abstract: A video projector, a cluster of video projectors and a method for wirelessly transmitting image data within the cluster of video projectors. The video projector includes a first antenna located at a first side of the projector and a second antenna located at a second side of the projector, opposite to the first side. Image data is divided into sub-parts, and distributed by assigning each image data sub-part to a video projector. A video projector receiving image data sub-parts extracts and stores the image data sub-part assigned to it, and retransmits image data sub-parts assigned to respectively a second and third video projectors.

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 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.

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: The invention relates to a method of determining the instant of consideration of a modification of at least one reception condition for signals in a communication system comprising at least two communication devices. The method comprises the steps, executed by a communication device, of detecting (E702) at least one modification of the reception conditions for signals in the communication system, determining (E703) the instant at which at least one other communication device will have detected the modification of the reception conditions for the signals, and establishing (E704) an operating mode of the first communication device as a function of the instant determined. The invention also relates to an associated determining device.