Abstract: The invention relates to a method for scheduling packets belonging to a plurality of data flow categories in a multi-access telecommunication system sharing a plurality of transmission resources. The method comprises at each transmission time interval, selecting, by a planner (CT, CF) a resource allocation plan and allocating the transmission resources to the data flows in accordance with the selected resource allocation plan. This selection is made by querying a look-up table (LUT) the content of which results from the implementation of a reinforcement learning and which makes it possible to identify, from the current state of the multi-access telecommunication system (s[t)]), the resource allocation plan to be selected, this plan being optimum to fulfil heterogeneous needs in terms of quality of service.

Abstract: The invention relates to a method for scheduling packets belonging to a plurality of data flow categories in a multi-access telecommunication system sharing a plurality of transmission resources. The method comprises at each transmission time interval, selecting, by a planner (CT, CF) a resource allocation plan and allocating the transmission resources to the data flows in accordance with the selected resource allocation plan. This selection is made by querying a look-up table (LUT) the content of which results from the implementation of a reinforcement learning and which makes it possible to identify, from the current state of the multi-access telecommunication system (s[t)]), the resource allocation plan to be selected, this plan being optimum to fulfil heterogeneous needs in terms of quality of service.

Abstract: The invention proposes a method for the transmission of data in a cooperative network comprising a source terminal (S), a destination terminal (D) and a relay terminal (R), comprising: in a first transmission (T1), the transmission of the data of a packet by the source terminal (S) to both the relay terminal (R) and the destination terminal (D); in the event of failure (N1) of the destination terminal (D) to successfully decode the data in the packet of the first transmission, and in the case of the data of the first transmission being successfully (O2) decoded by the relay terminal (R), the relay terminal transmits the data of the packet to the destination terminal in a second transmission (T2); in the event of failure (N3) of the destination terminal to successfully decode the data in the packet of the second transmission (T2), selection of the source terminal and/or relay terminal to retransmit the data of the packet to the destination terminal in a third transmission (T3), where the selection may be ba

Abstract: A method associates terminals with cells in a network including at least one macro-cell and a plurality of small cells. According to this association method, each terminal performs, for each possible association, a power measurement on the radio link and deduces a quality indicator of that link therefrom. The subset of associations is next selected making it possible to respect the usage constraints of the different users. For each possible association of this subset, a metric characteristic of the overall capacity of the network is computed and an optimal association is determined maximizing this metric.

Abstract: A discontinuous transmission method for a base station of a small cell in a heterogeneous network. Depending on the filling state of the buffer or the lifetime of the data, the base station decides to send the data in an element frame or, on the contrary, to enter standby during that frame. In the event it decides to send the data, it ensures beforehand that no base station of an adjacent small cell is in the process of transmitting. Otherwise, it goes into standby for a pseudorandom duration before trying a new transmission of said data.

Abstract: The invention relates to a packet forwarding method in a cooperative network implementing a source terminal, a destination terminal, and at least one relay terminal. In case of a packet decoding error in a node of the network, this method, depending on the outage state of a direct or relayed channel between two nodes of the network, enables a determination of the node(s) having to perform retransmission of the packet and if applicable, the transmission resource(s) to be used.

Abstract: The invention proposes a method for the transmission of data in a cooperative network comprising a source terminal (S), a destination terminal (D) and a relay terminal (R), comprising: in a first transmission (T1), the transmission of the data of a packet by the source terminal (S) to both the relay terminal (R) and the destination terminal (D); in the event of failure (N1) of the destination terminal (D) to successfully decode the data in the packet of the first transmission, and in the case of the data of the first transmission being successfully (O2) decoded by the relay terminal (R), the relay terminal transmits the data of the packet to the destination terminal in a second transmission (T2); in the event of failure (N3) of the destination terminal to successfully decode the data in the packet of the second transmission (T2), selection of the source terminal and/or relay terminal to retransmit the data of the packet to the destination terminal in a third transmission (T3), where the selection may be ba

Abstract: A method for reporting a user channel quality in a wireless telecommunication system. The user channel includes a plurality of transmission resources such as, for example, frequency intervals of an OFDM multiplex. The user terminal determines the transmission resources which would be in an outage position for a transmission with a set point bit rate. The user terminal transmits on the uplink the list of resources which would be in an outage position as well as a channel quality indicator for resources which would not be.

Abstract: A wireless OFDMA telecommunications system comprising a transmitter adapted to transmit, by means of an OFDM modulator, a plurality of data packets destined for receivers of a plurality of users, via the same plurality of transmission channels, the transmission channel of a user being associated with a group of sub-carriers of the OFDM multiplex and a set of OFDM symbol times of a transmission interval, each receiver being adapted to signal to the transmitter the loss of a packet transmitted over the transmission channel of the corresponding user, said transmitter further comprising a packet scheduler adapted to control retransmission of each packet lost by means of said modulator. Each receiver comprises detection means of an outage situation of the transmission channel of the corresponding user and signals this to said transmitter by means of an outage information (OUTAGE/NOUTAGE).

Abstract: The invention relates to an iterative method by message passing for decoding of an error correction code that can be displayed in a bipartite graph comprising a plurality of variable nodes and a plurality of check nodes. For each iteration in a plurality of decoding iterations of said method: variable nodes or check nodes are classified (720) as a function of the corresponding degrees of reliability of decoding information available in the neighborhoods (Vn(d),Vm(d)) of these nodes, a node with a high degree of reliability being classified before a node with a low degree of reliability; each node thus classified (725) passes at least one message (?mn,?mn) to an adjacent node, in the order defined by said classification. The invention also relates to a computer program designed to implement said decoding method.

Abstract: A method for soft demapping of complex-valued symbols y(k) (k=1, 2, . . . , K) by calculation of a Logarithm of Likelihood Ratio (LogLR) such that: Log ? ? LR ? ( b I , q ) = ln ? ? ? ? ? S l , q ( 1 ) ? exp ( - 1 2 ? ? ? ? y ~ ? ( k ) - ? ? 2 ) ? ? ? ? S q , l ( 0 ) ? exp ( - 1 2 ? ? ? ? y ~ ? ( k ) - ? ? 2 ) wherein bI,q is the qth coded bit of an in-phase part of a transmitted signal, ? is an asymptotic Signal-to-Interference-plus-Noise Ratio, {tilde over (y)}(k) is a standardized symbol associated with y(k), ? is a reference symbol of QAM constellation associated with a M-QAM modulation, S(1)I,q and S(0)I,q are complex plane partitions that bring together, respectively, all reference symbols ? having a “1” at the position (I, q) and all reference symbols ? having a “0” at the position (I, q), a formula similar to LogLR being given for the bit bQ,p, pth coded bit of a quadrature part of the transmitted signal.

Abstract: A method for reporting a user channel quality in a wireless telecommunication system. The user channel includes a plurality of transmission resources such as, for example, frequency intervals of an OFDM multiplex. The user terminal determines the transmission resources which would be in an outage position for a transmission with a set point bit rate. The user terminal transmits on the uplink the list of resources which would be in an outage position as well as a channel quality indicator for resources which would not be.

Abstract: The invention relates to a packet forwarding method in a cooperative network implementing a source terminal, a destination terminal, and at least one relay terminal. In case of a packet decoding error in a node of the network, this method, depending on the outage state of a direct or relayed channel between two nodes of the network, enables a determination of the node(s) having to perform retransmission of the packet and if applicable, the transmission resource(s) to be used.

Abstract: This method for carrying out the flexible demodulation of data modulated following an amplitude modulation in quadrature is used in a communications system employing a code division multiple access technique (CDMA) and an optical frequency division multiplexing (OFDM) using non-binary spread codes. The invention includes steps for determining a simplified expression specific to the logarithm of the likelihood ratio.

Abstract: A wireless OFDMA telecommunications system comprising a transmitter adapted to transmit, by means of an OFDM modulator, a plurality of data packets destined for receivers of a plurality of users, via the same plurality of transmission channels, the transmission channel of a user being associated with a group of sub-carriers of the OFDM multiplex and a set of OFDM symbol times of a transmission interval, each receiver being adapted to signal to the transmitter the loss of a packet transmitted over the transmission channel of the corresponding user, said transmitter further comprising a packet scheduler adapted to control retransmission of each packet lost by means of said modulator. Each receiver comprises detection means of an outage situation of the transmission channel of the corresponding user and signals this to said transmitter by means of an outage information (OUTAGE/NOUTAGE).

Abstract: A method of estimating an SINR ratio of an OFDM-CDMA transmission signal spread with spread codes, the transmission signal being transmitted between a transmission apparatus and a receiver apparatus, the method including: receiving the signal spread with spread codes at the receiver apparatus; and calculating, with a processor at the receiver apparatus, an estimate of the SINR ratio for the signal spread with the spread codes independently of a value of the spread codes.

Abstract: To select the frequency (SF) and/or time (ST) spreading parameters for a communication system using a quadrature amplitude modulation and implementing a CDMA technique and an OFDM multiplexing the attenuation coefficients of the propagation channel are estimated For all the F sub-bands of SF subcarriers and the T blocks of ST OFDM symbols, at least one asymptotic signal-to-interference+noise ratio (SINR) is determined, based on the attenuation coefficients of the propagation channel and the type of equalizer used by the receiver. From this, for each coded information block obtained from the modulation, the compressed asymptotic SINR is deduced, expressed by an analytical formula dependent on the frequency (SF) and time (ST) spreading parameters and the frequency (SF) and time (ST) spreading parameters which maximize the value of the compressed asymptotic SINR are selected.

Abstract: The invention relates to a method of scheduling packets in a multi-access telecommunication system sharing a plurality of transmission resources. The packets relating to the various accesses are classed (110) in a first category of urgent packets (Qu) and in a second category of non-urgent packets (Qn—u). The packets of the first category form the subject of a first scheduling (120) and of an allocation of the said resources according to this first scheduling (125). The packets of the second category thereafter form the subject of a second scheduling (130) and of an allocation of the remaining resources, according to this second scheduling (135).

Abstract: The invention relates to an iterative method by message passing for decoding of an error correction code that can be displayed in a bipartite graph comprising a plurality of variable nodes and a plurality of check nodes. For each iteration in a plurality of decoding iterations of said method: variable nodes or check nodes are classified (720) as a function of the corresponding degrees of reliability of decoding information available in the neighbourhoods (Vn(d),Vm(d)) of these nodes, a node with a high degree of reliability being classified before a node with a low degree of reliability; each node thus classified (725) passes at least one message (?mn,?mn) to an adjacent node, in the order defined by said classification. The invention also relates to a computer program designed to implement said decoding method.

Abstract: This method for carrying out the flexible demodulation of data modulated following an amplitude modulation in quadrature is used in a communications system employing a code division multiple access technique (CDMA) and an optical frequency division multiplexing (OFDM) using non-binary spread codes. The invention includes steps for determining a simplified expression specific to the logarithm of the likelihood ratio.