Abstract: A priority-resource-limited CoMP scheme is proposed based on a coordination priority index of users which comes into play to perform cooperation set selection and resource allocation in small cell networks. The CoMP control unit (CCU) configures and then transmits to the donor (serving) Transmission/Reception Point (TRP) the coordination priority index which is determined as a function of the required Bit Rate for that specific User Equipment and the SINR or the CQI. The donor Transmission/Reception Point (TRP) then transmits the coordination priority indexes sent by the CCU to the corresponding User Equipment (UE)s. The configuration of the coordination priority index allows the User Equipment to select a subset of Channel State Information reports or Channel State Information quantities to report so that the threshold index of the coordination priority is met.

Abstract: A communication system having to an open radio access network architecture, the communication system includes a number (K) of user equipments configured to exchange messages through the communication system, the communication system comprising one or more radio unit and a distributed unit, each radio unit being connected to the distributed unit through a fronthaul link having a given capacity. The communication system comprises a coordination system being configured to coordinate the exchanges between the radio units of the system and the distributed unit, in response to a signal received by the radio units from a user equipment.

Abstract: A decoder for decoding a signal received through a transmission channel represented by a channel matrix using a search sphere radius. The decoder comprises a radius determination device for determining a search sphere radius from a preliminary radius. The radius determination device is configured to: i. apply a machine learning algorithm to input data derived from the received signal, the channel matrix and a current radius, the current radius being initially set to the preliminary radius, which provides a current predicted number of lattice points associated with the current radius; ii. compare the current predicted number of lattice points to a given threshold; iii.

Abstract: A precoder for precoding a vector of information symbols to be sent to a plurality of users, the precoder includes a user ordering and grouping unit configured to group the plurality of users depending on one or more quality of service indicators and on modulation and coding parameters associated with the plurality of users, the user ordering and grouping unit being configured to divide a predefined upper triangular precoding matrix into a plurality of sub-matrices and to divide the vector of information symbols into a plurality of sub-vectors, each sub-vector comprising information symbols to be sent to a group of users, the sub-vectors being arranged according to an arbitrary order of the one or more quality of service indicators; a precoding unit configured to determine a perturbation vector according to the minimization of a transmit power metric, the perturbation vector comprising a plurality of perturbation sub-vectors, each perturbation sub-vector corresponding to a sub-vector of information symbols, t

Abstract: In a base station of a radio access network, a distribution unit is configured to receive, through a radio head apparatus of the base station, a channel information signal transmitted by a user equipment over a radio channel, obtain based on the channel information signal compression model information indicating a neural network to be used for compression by the radio head apparatus amongst a set of neural networks, and sending the compression model information to the radio head apparatus. The radio head apparatus is configured to receive the compression model information from the central processing apparatus, receive a data signal from a user equipment over a radio channel, pre-process the data signal, including compress the data signal by using a neural network, the neural network being selected based on the compression model information sent by the distribution unit, and transmit the pre-processed data signal to the central processing apparatus.

Abstract: A lattice prediction device for predicting a number of lattice points falling inside a bounded region in a given vector space is provided. The bounded region is defined by a radius value, a lattice point representing a digital signal in a lattice constructed over the vector space. The lattice is defined by a lattice generator matrix comprising components. The lattice prediction device comprises a computation unit configured to determine a predicted number of lattice points by applying a machine learning algorithm to input data derived from the radius value and the components of lattice generator matrix.

Abstract: A decoder for decoding a signal received through a transmission channel represented by a channel matrix using a search sphere radius. The decoder comprises a radius determination device for determining a search sphere radius from a preliminary radius. The radius determination device is configured to: i. apply a machine learning algorithm to input data derived from the received signal, the channel matrix and a current radius, the current radius being initially set to the preliminary radius, which provides a current predicted number of lattice points associated with the current radius; ii. compare the current predicted number of lattice points to a given threshold; iii.

Abstract: A precoder for precoding a vector of information symbols is provided. The precoder includes a radius determination unit configured to determine a search sphere radius, the determination of the search sphere radius comprising applying a machine learning algorithm to input data dependent on the vector of information symbols and on a predefined precoding matrix; a sphere encoding unit configured to determine a perturbation vector from lattice points found inside a spherical region by applying a sphere search-based sequential algorithm, the spherical region having as a radius the search sphere radius, and a precoding unit configured to precode the vector of information symbols using the perturbation vector and a precoding matrix.