Abstract: A radiocommunications system (E) that implements a method for attachment between a mobile radiocommunications network (RM) and a remote radiocommunications network (RD). The infrastructure of each of the mobile radiocommunications network and remote radiocommunications network includes a network supervision (SUPM, SUPD), an application level (NAPM, NAPD) having at least one application (APM, APD), an authentication and mobility management level (NAMM, NAMD) and user terminals (TUM, TUD). A radio management level (NCRM, NCRD) is also included having at least one base station (BSM, BSD).

Abstract: A method for attachment and authentication of a user terminal of a home type radiocommunication network with a visited type radiocommunication network, the home network including home means for attachment to a packet network and the visited network including: at least one visited base station able to ensure radio transmission and reception with user terminals located in at least one visited cell attached to the visited base station; visited authentication and control means of user terminals able to authenticate the user terminals attached to the network; and at least one visited distribution gateway ensuring radio reception and transmission with the at least one visited base station.

Abstract: A telecommunications network, especially an LTE type network, is adapted to a change in configuration. The telecommunications network includes at least a first transmission device, of base station or transmission relay type, and a second transmission device, of base station or transmission relay type. There is no radio link in existence between the first transmission device and the second transmission device before the change in configuration. The process for change includes: detecting a change in the configuration of the telecommunications network; allocating radio resources in the communications frames of the first communications element for determination of the transmission quality with the second communications element; and establishing a radio link between the first transmission device and the second transmission device if the determined transmission quality is advantageous. The process is implemented by a telecommunications networking infrastructure and by a transmission device.

Abstract: Radio resources are dynamically allocated in a shared band communication system operating in direct mode (DMO). The communication system includes terminals organized in groups. Each group is allocated a resource from a number of resources available within the communication system. This process includes allocating to the group at least one other further resource from the number of resources until an attempted access to the further resource from the group to which the further resource had been allocated has been detected.

Abstract: A method for centralizing events for a multilevel hierarchical computer management system, the system including a plurality of source equipments generating events and a plurality of event collectors per level, the method including selecting by an upper level collector a lower level collector according to operational parameters and/or a link quality of service of the lower level collector; receiving by the collector the events from the selected lower level collector; periodically verifying if the selected collector is available and if not repeating the selection step; and comparing by the upper level collector its events with those from the unselected lower level collectors and receiving from one of these unselected lower level collectors the events that are different.

Abstract: A method for attaching a user terminal to a packet network via a meshed radiocommunications network infrastructure includes selecting a host packet network dedicated to at least a category of users to which a user terminal belongs based on a second user identification code of the meshed network and/or access information pertaining to rights for attachment of user terminals to at least one packet network. The method finds an application in all types of infrastructure of meshed radiocommunications networks and finds a particularly interesting application in the case of PMR type professional radiocommunications networks.

Abstract: A method of managing a cell of a radio telecommunication network, the cell including a site controller to control, via a packet network, a plurality of transmitters distributed over different sites of the cell such that the transmitters of the different sites transmitting over a same frequency band form a transmission channel, a channel of the transmission channel being a control channel dedicated to a transmission of signals relative to an operation of the cell, the signals including general operating signals and specific operating signals, the method including: transmitting a request comprising general operating signals from the site controller to a transmitter selected by said site controller to control storage of general operating signals in the selected transmitter, and to control handling of a transmission of the general operating signals addressed to all terminals present in the cell over the control channel in case of failure of the site controller and/or of the packet network.

Abstract: A first broadband network divided into sectors and a second narrowband network have collocated cells and a common wide frequency band. The interference produced by the first network on the second network is reduced for a carrier to interference ratio threshold allowable at the reception in the second network. For example, a base station (BSBB,nc) in a given cell (CBB,nc) of the first network attenuates by an attenuation parameter the emission power of each subcarrier which is adjacent to a carrier of one of the groups allocated to preselected cells (CNB,i) of the second network in a sector (Sns) of the given cell and on levels (L0 to LI-1) starting from the given cell (CBB,nc). The attenuation parameter is low for a level close to the given cell.

Abstract: A transmission of information is established between an emitting mobile terminal and at least one receiving mobile terminal of the same group of terminals pertaining to a shared-resource radiocommunication network operating in a direct mode includes the step of emitting by the emitting terminal of a transmission request to inform the other receiving terminals of the group of its intention to transmit information. Each receiving terminal of the group then determines whether, on the basis of at least one pre-defined selection strategy, it will accept the transmission of information. If it will, the receiving terminal transmits a return signal comprising data relating to the emitting terminal to the other terminals of the group. Then, the emitting terminal checks whether it respects the transmission conditions. If it does, the emitting terminal transmits the information to the other terminals in its group via at least one resource allocated to the group.

Abstract: This transmission comprising a first transmission of a packet (52), comprising the steps consisting in: a first processing (54) of said packet (52) to obtain a first packet (56); and a coding (57, 59) of the first packet (56); wherein, when the first coded packet is received erroneous, the method comprises a second transmission of said packet, comprising: the steps implemented in the transmitter, consisting in: a second processing (84) of said packet (52) to obtain a second packet (86); and a coding (87, 89) of the second packet (86); and the steps implemented in the receiver, consisting in: a modification of the first and/or the second coded packets to obtain two packets in which the difference due to the first and second processings is compensated for: a combination (110) of both packets according to a HARQ procedure; and a decoding (112) of the combined packet.

Abstract: A method of activating a function such as unlocking a mobile telephone keypad by an instruction sequence {xi, . . . , xn} of a length n given to a user, who validates the sequence to activate the function. The instruction sequence is determined randomly, and for each instruction xi, the method includes: sending an instruction xi to the user; receiving a response yi from the user; analysis for validation of instruction xi; instruction xi is said to be validated when yi is a valid response for xi and the time elapsed between the sending of xi and the receipt of yi is shorter than a set period ?i; if instruction xi is not validated then the function is not activated; sending the next instruction, if any, after validation of xi; activating the function when at least the last instruction sent is validated.

Abstract: A guidance system (SG) for an individual (IND) moving in an unknown environment establishes a guidance loop (B) between a measurement module (MM) placed on the individual and a remote guidance platform (PG). In the measurement module, a means (CP) collects measurement data (DM) that are transmitted by another means (UC1) of transmission to the guidance platform via a first communication channel. Then, at the guidance platform, a means (UT2) determines the tactical position data (DST) from the transmitted measurement data (DM), and another means (UC2) transmits determined guidance data (DG) from the tactical position data to a communication device of the individual by means of a second communication channel (R2), thus closing the guidance loop.

Abstract: The invention concerns a method for scheduling frequency channels implemented in a device for a narrowband radiocommunication system sharing with a broadband radiocommunication system, each comprising a narrowband base station and a broadband base station, and the same frequency band, the frequency band being in part divided into a given number of frequency blocks, each comprising a given number of carrier frequencies to optionally be allocated to the narrowband base stations.

Abstract: A method for managing a degraded mode of a cell of a cellular network including a site controller for controlling, via a packet network, transmitters distributed over various sites of the cell such that transmitters implementing the same pair of frequencies over different sites form a channel which, in dynamic mode, is allocated dynamically to any communication between terminals of the cell, the channel including a master transmitter selected by the controller. The method includes, in each master transmitter on detection of a failure of the controller: switching in degraded mode of the master transmitter, by associating with the channel a predefined communication known to the terminals, and transmission from the master transmitter, via the network, of a control message informing a control console connected to the packet network of the implementation of the degraded mode so that the console participates in a communication underway in the channel.

Abstract: Radio blocs (BRjp) shared in a predetermined frequency band during a periodic radio frame (TRi) between base stations (BS) are allocated to applications in base stations and mobile stations. Each radio block spreading on frequencies (Cj) of said band during a time slot (M?t) of the radio frame and can be associated with an uplink or a downlink. To meet quality-of-service parameters required by an application, a base station estimates occupation rates of the radio blocks during consecutive radio frames, and allocates to the application at least one radio block having an occupation rate less than a threshold and a periodicity expressed in period of frame and depending on the required quality-of-service parameters. The base station are autonomous for the radio block allocations.

Abstract: A method of management for operating a first system of communication of the broadband type communication system emitting over a first frequency range, and a second system of communication of the narrow band type communication system emitting over a second frequency range, the first system and the second system using all or part of a same frequency band, such common frequency band being called a crossover frequency band for both systems, the method including: embodying a scan operation from at least the crossover frequency band of the two systems using a scan device from the first communication system; identifying, after the scan operation, the frequency channels used by the second communication system; adapting the operating of the first communication system within the frequency channels identified as being used by the second communication system.

Abstract: An error correction encoding method is provided for encoding source digital data having the form of a frame, wherein the data can be classified into a plurality of classes. The present encoding method includes the following steps: a first encoding step for encoding data to be encoded formed by the data of a first class, to obtain encoded data; and implementing the following step successively for at least one other class: mixing data of the other class and the data encoded or to be encoded from a preceding encoding step; and encoding data to be encoded formed by mixed data to obtain encoded data. Related decoding methods, as well as encoding and decoding devices are also disclosed.

Abstract: The invention relates to a relay node capable of managing the establishment of a fixed number of connections to detected neighboring relay nodes in order to form an ad hoc network with wide coverage. The relay node comprises a means for classifying the neighboring relay nodes according to a parameter, a means for selecting a fixed number of first classified neighboring relay nodes and means for establishing connections between the selected neighboring relay nodes and said relay node. The relay node also comprises a means for upgrading, before the selection of the fixed number of first neighboring relay nodes, the neighboring relay nodes determined as being non-accessible or accessible with upgrading in the ad hoc network from said relay node to make them able to be selected.

Abstract: This method for the estimation of a channel between an emitter and a receiver, where the said emitter emits a signal comprising symbol frames distributed in time and frequency, among which pilot symbols known to the receiver, is characterized in that it comprises the following steps: •—computation (30) of a covariance matrix MF and MT of the channel in the frequency and time domains respectively; •—decomposition (32) of the covariance matrices MF and MT into eigenvectors according to the relations MF?WFHNFWF and MT?WTHNTWT; •—computation (34) of the Kronecker product of the matrices NVF and WT to obtain an eigenvector matrix W; •—computation (34) of a diagonal eigenvalue matrix N equal to the Kronecker product of the eigenvalue matrices NF and NT; and •—estimation of the channel with the help of pilot symbols and matrices W and N using the maximum a posteriori or quadratic error minimisation criterion.

Abstract: A radio communications system comprising a plurality of cells, each containing a base station and mobile terminals. Said system is able to manage group communications between different mobile terminals, allocating during the establishment of a group communication for each cell an uplink channel contained in an uplink carrier frequency and a downlink channel contained in a downlink carrier frequency. The system is able to manage a number of downlink channels per downlink carrier frequency strictly greater than a number of uplink channels per uplink carrier frequency.