Abstract: A method for associating user equipment with base stations of a cellular network, in particular of a heterogeneous network such as a 5G network, uses a multi-agent reinforcement learning (MARL) algorithm. When a user equipment enters the network, the agent associated with this equipment downloads the instance of an association meta model to a coordinating unit, pre-trained by means of reinforcement learning. The agent subsequently constructs a local observation vector, comprising observables relating to the user equipment, and a global observation vector, including observables relating to the environment of this equipment. The local and global observation vectors are projected into the same reference space, the concatenation of the vectors thus projected encoding the state of the agent. It deduces from the model and from this state, an association decision. The model is updated according to a policy gradient method to consider evolution of the environment of the user.

Abstract: The present description concerns a method of processing by a radio transmitter/receiver (12) of a radio signal (SR) comprising a telecommunications signal disturbed by pulses of a radar signal, the method comprising the steps of: estimating the instantaneous power of the pulses, estimating the ratio of the average power of the telecommunications signal to the instantaneous power of the radar pulses, and modifying the radio signal at the locations of the radar pulses when said ratio is smaller than a threshold.

Abstract: The present description concerns a method of processing by a radio transmitter/receiver (12) of a radio signal (SR) comprising a telecommunications signal disturbed by pulses of a radar signal, the method comprising the steps of: estimating the instantaneous power of the pulses, estimating the ratio of the average power of the telecommunications signal to the instantaneous power of the radar pulses, and modifying the radio signal at the locations of the radar pulses when said ratio is smaller than a threshold.

Abstract: This envelope-detecting circuit comprises: a first multiplier able to multiply a first example of a signal received on an input port by itself, a modifier able to modify the amplitude of the power spectrum, of a second example of the signal received on the input port, at the frequency fc without modifying the amplitude of this power spectrum in a useful frequency band, a second multiplier able to multiply the modified signal by itself, a subtractor able to subtract from each other the signals delivered by the multipliers, a filter able to remove frequency components higher than or equal to 2fc in a signal obtained from the signal delivered by the subtractor, this filter being able to deliver the result of this filtering on an output connected to an output port of the envelope-detecting circuit.

Abstract: The present description concerns a method of processing by a radio transmitter/receiver (12) of a radio signal (SR) comprising a telecommunications signal disturbed by pulses of a radar signal, the method comprising the steps of: estimating the instantaneous power of the pulses, estimating the ratio of the average power of the telecommunications signal to the instantaneous power of the radar pulses, and modifying the radio signal at the locations of the radar pulses when said ratio is smaller than a threshold.

Abstract: The present invention relates to a method for associating user equipment with base stations of a cellular network, in particular of a heterogeneous network such as a 5G network, said method using a multi-agent reinforcement learning (MARL) algorithm. When a user equipment enters the network, the agent associated with this equipment downloads the instance of an association meta model to a coordinating unit, pre-trained by means of reinforcement learning. The agent subsequently constructs a local observation vector, comprising observables relating to the user equipment, and a global observation vector, including observables relating to the environment of this equipment. The local and global observation vectors are projected into the same reference space, the concatenation of the vectors thus projected encoding the state of the agent. It deduces from the model and from this state, an association decision.

Abstract: A method for selection of unlicensed transmission resources to set up a communication between a base station, such as a base station of a small cell of a heterogeneous cellular network, and a mobile terminal. The transmission resource is selected coherently by the base station and the mobile terminal from transmission quality indices for these resources. The quality index of a resource is determined by the base station (or the mobile terminal) from the state of at least one first counter of the base station (or the mobile terminal) associated with this resource. The first counter of the base station associated with a selected resource is incremented if the selected resource is available. The first counter of the mobile terminal associated with a selected resource is incremented if it receives a beacon signal on the selected resource.

Abstract: This envelope-detecting circuit comprises: a first multiplier able to multiply a first example of a signal received on an input port by itself, a modifier able to modify the amplitude of the power spectrum, of a second example of the signal received on the input port, at the frequency fc without modifying the amplitude of this power spectrum in a useful frequency band, a second multiplier able to multiply the modified signal by itself, a subtractor able to subtract from each other the signals delivered by the multipliers, a filter able to remove frequency components higher than or equal to 2fc in a signal obtained from the signal delivered by the subtractor, this filter being able to deliver the result of this filtering on an output connected to an output port of the envelope-detecting circuit.

Abstract: This invention relates to a method for selection of unlicensed transmission resources to set up a communication between a base station such as a base station of a small cell of a heterogeneous cellular network and a mobile terminal. The transmission resource is selected coherently by the base station and the mobile terminal from transmission quality indices for these resources. The quality index of a resource is determined by the base station (or the mobile terminal) from the state of at least one first counter of the base station (or the mobile terminal) associated with this resource. The first counter of the base station associated with a selected resource is incremented if the selected resource is available. The first counter of the mobile terminal associated with a selected resource is incremented if it receives a beacon signal on the selected resource.

Abstract: A method for processing a data packet before transmission over a radio communications network as a succession of waveforms transmitted at positions defined by hopping codes, which are time positions or frequency positions. The packet is transmitted over a communications channel of the network by a transmitter node to a destination node. The method includes the following steps performed for each bit of the data packet to be transmitted, referred to as the current bit: calculating a hopping code at least as a function of the value of the current bit and of an encryption key generated by a pseudo-random generator, the encryption key having size greater than the maximum size of a data packet transmitted over the channel; and causing a waveform to be transmitted at the position defined by the calculated hopping code, the transmitted waveform being identical regardless of the value of the current bit.

Abstract: A method of communicating between at least one event detector sensor and a collector of event detection data transmitted by the sensor in the form of an event signalling message whose modulation is defined by at least one spreading code. The method comprises the steps implemented by the sensor of, upon detection of an event, generation of data of event detection, of reception of a synchronization message emitted by the collector, the synchronization message comprising a seed for a pseudo-random generation of at least one spreading code and of pseudo-random generation of at least one spreading code on the basis of the seed. The method furthermore comprises a step of emitting an event signalling message whose modulation is defined by the at least one spreading code generated randomly, the event signalling message comprising the event detection data.

Abstract: Provided are methods for receiving and transmitting a communication signal by radio channel and corresponding devices and computer programs. A plurality of nodes alternately comply with sleep periods and wake periods, and a transmitter node precedes transmission of data to a recipient node with a step of transmitting a preamble of a length at least equal to a sleep period of the recipient node, wherein at least two transmission channels has been defined between the nodes with a view to the transmission of the preamble. The method includes selecting from the plurality of channels at least one channel for listening to the preamble, called a current channel; and deciding to the change the listening channel on detection of at least one triggering event likely to affect predetermined operational constraints of the receiver node.

Abstract: A data transmitter is provided for transmitting data that makes it possible for nodes, relaying the preamble transmitted by a transmitter node, to also transmit data to a single destination node without, in turn, transmitting another preamble. In a network comprising a plurality of nodes that alternately observe sleeping and waking periods in an asynchronous manner relative to each other, a node receives a first preamble that is transmitted by at least one transmitter node. The first preamble comprises at least one first set of information related to transmission, by the transmitter node, of a first data set to a destination node. The adjacent node transmits a second data set to the destination node or to another node from the transmission of the first data set.

Abstract: A method and apparatus are provided for sending pulses from a sender device to a receiver device in a transmission channel. The pulses represent information symbols, with each of these pulses being associated with a time slot in a symbol time. The method includes a training step that is carried out before sending payload information and that includes sending a training sequence made up of two parts. A first part of the training sequence includes at least one pulse of energy that is greater than the energy of a pulse carrying payload information. There are a large number of time slots between the sending of the pulse and the sending of the next pulse. A second part of the training sequence includes a set of pulses known in advance and similar to the pulses used for carrying payload information, the energy of each of these pulses being equivalent to the energy of a pulse carrying payload information.

Abstract: A method is provided for sending a communications signal in a communications network having a plurality of nodes assuming alternating sleeping and waking states and in which a sender node executes a step of sending an initial preamble, prior to sending data to a destination node. The method includes at least one operation of a neighbor node of the sender node relaying the initial preamble, where a relaying operation corresponds to sending a preamble formed from the preamble sent during the preceding relaying operation, the preamble sent during the first relaying operation being formed from the initial preamble, and the at least one relaying operation continuing until the destination node for the data detects the sent preamble.

Abstract: A method for processing a data packet before transmission over a radio communications network as a succession of waveforms transmitted at positions defined by hopping codes, which are time positions or frequency positions. The packet is transmitted over a communications channel of the network by a transmitter node to a destination node. The method includes the following steps performed for each bit of the data packet to be transmitted, referred to as the current bit: calculating a hopping code at least as a function of the value of the current bit and of an encryption key generated by a pseudo-random generator, the encryption key having size greater than the maximum size of a data packet transmitted over the channel; and causing a waveform to be transmitted at the position defined by the calculated hopping code, the transmitted waveform being identical regardless of the value of the current bit.

Abstract: A method of communicating between at least one event detector sensor and a collector of event detection data transmitted by the sensor in the form of an event signalling message whose modulation is defined by at least one spreading code. The method comprises the steps implemented by the sensor of, upon detection of an event, generation of data of event detection, of reception of a synchronization message emitted by the collector, the synchronization message comprising a seed for a pseudo-random generation of at least one spreading code and of pseudo-random generation of at least one spreading code on the basis of the seed. The method furthermore comprises a step of emitting an event signalling message whose modulation is defined by the at least one spreading code generated randomly, the event signalling message comprising the event detection data.

Abstract: The invention relates to a method of measuring a distance between two radio-communication devices (1, 2), consisting in measuring a radio signal exchange delay. According to the invention, the time-of-flight of the signals is calculated from the exchange delay and subsequently corrected using an analysis of a single channel measuring frame that is transmitted between the two devices. The corrected time-of-flight corresponds to the shortest propagation path followed by the radio signals. In the majority of radio transmission medium configurations, the corrected time-of-flight is a straight line measurement of the distance separating the two devices (1, 2).

Abstract: A data transmitter is provided for transmitting data that makes it possible for nodes, relaying the preamble transmitted by a transmitter node, to also transmit data to a single destination node without, in turn, transmitting another preamble. In a network comprising a plurality of nodes that alternately observe sleeping and waking periods in an asynchronous manner relative to each other, a node receives a first preamble that is transmitted by at least one transmitter node. The first preamble comprises at least one first set of information related to transmission, by the transmitter node, of a first data set to a destination node. The adjacent node transmits a second data set to the destination node or to another node from the transmission of the first data set.

Abstract: The invention relates to a method of implementing operations involving the processing a radio-communication frame (CMF) in a system comprising at least three radio transmitter/receiver devices (1-5), consisting in transmitting the frame in response to a first request signal (REQ1) transmitted by a device belonging to the system (1). According to the invention, the frame is processed in the device (1) that transmitted the first request signal (REQ1) as well as in other devices belonging to the system (1, 3-5) which transmitted respective request signals (REQ2-REQ4) within a pre-determined time period.