France Telecom

Orange

Jean Schwoerer

Benoît Miscopein

Raphaël Visoz

Apostolos Kountouris

Patrice Senn

Michel Pons

Eric Batut

Frederic Evennou

Jean-Marie Gorce

Francois Marx

François Marx

David Derrien

Asma Selmi

Jean-Pierre Cances

A method for managing a communication set up according to a first communication mode between terminals in a telecommunications system. The method includes: obtaining, by a first terminal participating in the communication, a request to change communication mode so as to transition from the first communication mode to a second communication mode; switching the communication from the first communication mode to the second communication mode; wherein the first communication mode and the second communication mode are different communication modes in a set comprising a two-way voice communication mode, a one-way voice communication mode, and a text-based communication mode.

Method for managing communication between terminals in a telecommunications system and devices for implementing the method

A method and user equipment to select an emission power from a set of possible emission powers depending on their location relative to a base station. In a 5G development scenario, a massive number of user equipment will be deployed. The data exchanged by this user equipment is mainly signalling data whose volume generates an overload of the network resources. A resource access scheme called uncoordinated resource access scheme reduces the volume of the exchanged data. So that the base station can decode all signals emitted by the user equipment, it is necessary to have a number of emission power levels greater than the number of user equipment. By proposing the user equipment to select an emission power from a set of possible emission powers depending on their location relative to the base station, the solution allows the base station to decode the signals emitted by a greater number of user equipment.

Method for determining a plurality of possible emission power values, method for selecting from this plurality of possible emission power values for an uncoordinated access to the communication medium

The invention relates to a method for the telecommunication of data by frequency hopping in a first frequency band, wherein the frequency hops follow a predetermined time sequence, known at least to a data transmitter, characterized in that it comprises the following steps implemented by said data transmitter:

Data transmission/reception by frequency hopping

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.

Method for transmitting a communication signal

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.

Method of transmitting a communications signal

The invention relates to a method of measuring a distance between two radio-communication devices (), 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 ().

Method of measuring a distance between two radio-communication devices and device adapted to implement one such method

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 (-), consisting in transmitting the frame in response to a first request signal (REQ) transmitted by a device belonging to the system (). According to the invention, the frame is processed in the device () that transmitted the first request signal (REQ) as well as in other devices belonging to the system (-) which transmitted respective request signals (REQ-REQ) within a pre-determined time period.

Processing of a radio-communication frame in a system comprising at least three radio transmitter/receiver devices

The invention relates to method and device for detecting propagation paths in pulse transmission, wherein a received signal comprises pulses on each time symbol. After synchronizing a pulse-based reception, the inventive method consists (A) in determining the arrival times of pulses of the same current time symbol, (B) in generating a path hypotheses by assigning an initial score to each dated pulse, (C) in determining the arrival times of pulses of the time symbol following the current symbol, (D) in relatively comparing the arrival times of pulses of the following time symbol with the arrival times of the path hypotheses and (E) in updating scores according to the relative comparison results. Said path detecting method is suitable for pulse information transmission, in particular in UWB.

Method for detecting paths in pulse transmission and a device for carrying out said method

Method for the detection of symbols by a receiver, each symbol (S, S) being transmitted from a transmitter in the form of a succession of pulses () representing a predetermined sequence of numerical values, the numerical values having respective nominal weights within each predetermined sequence. According to this method, a succession of pulses corresponding substantially to a symbol (S, S) transmitted from the transmitter is received at the receiver. A sequence of numerical values (S) corresponding to the said received succession of pulses is determined, the said numerical values having respective weights within the determined sequence. The received symbol is chosen as a function of the determined sequence of numerical values, the choice comprising a weighting of the numerical values of the determined sequence, chosen to re-establish the respective nominal weights of the said numerical values.

Method for the detection of symbols and associated receiver

The invention relates to a method for adjusting a pulse detection threshold consisting in detecting a pulse when the edge of said pulse envelop crosses the threshold, in allocating (A) a staring value (TH) to the threshold and in adjusting (B) the threshold (TH) in such a way that the number of pulses detected on at least one observation window (OW) satisfies a predetermined criterion in a determined time.

Method and device for adjusting a pulse detection threshold, and pulse detection and corresponding receiver

A method for the synchronization of a radio receiver, comprising an estimation of the moment when a pulse () is received (), performed from the moment when a previous pulse was received. The estimated moment is compared with the real moment when the pulse () is received in order to validate an association of pulses with values of a code recorded in the receiver (). A moment for the beginning of transmission of a symbol is thus deduced, enabling the receiver to be synchronized in relation to the transmitted radio pulse sequence.

Method for the synchronization of a radio receiver, and adapted receiver for the implementation of said method

The method comprises a phase, applied by the first equipment (A), for estimating a first time of flight between the two equipments (A, Z) corresponding to the signal transmission time to go from one equipment to the other along a propagation path, called the 'strongest path', taken by a main part of the energy of the signals, a phase for estimating a difference in time of flight comprising the sending of a channel sounding frame by the first equipment to the second and, from the received radio signals corresponding to said channel sounding frame, estimating a difference in time of flight between the strongest propagation path and a first propagation path, performed by the second equipment, and a phase for calculating the distance between the two equipments (A, Z) comprising the determination of a second time of flight by subtracting the estimated difference in time of flight from the estimated first time of flight (E) and calculating the distance between the two equipments from the duly determined second time of flight.

Method of estimating the distance between two radio equipments

A method and a system for receiving an ultra-wideband signal with a self-adapting number of propagation paths. The transmitted signal includes, over a symbol time, a series of direct successive modulated pulses which propagate along a direct propagation path and secondary pulses which are associated with each direct pulse and which each propagate along a secondary propagation path. The method includes: receiving the series of direct and secondary pulses on the same receiver circuit; creating a composite correlation pattern, including a series of elementary patterns which are time-shifted in relation to a first elementary correlation pattern; calculating the value of the global correlation coefficient between each direct pulse which is associated with the plurality of secondary pulses and the composite correlation pattern, in order to obtain a global correlation value of the symbol, sum of the cross-correlation coefficients of each of the direct and secondary pulses.

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Grenoble, France

Jean Schwoerer