Abstract: A method of communication between a user terminal powered by a battery and a base station allowing optimization of the management of the battery of the user terminal, includes a step of selecting from among terminals, termed surrounding terminals, powered by battery and situated in a zone within range of the base station, terminals whose distance with the user terminal is less than a predetermined distance and whose battery level is greater than a predetermined threshold, termed neighbour terminals, a step of configuring the neighbour terminals and the user terminal by way of a configuration setpoint, a step of transmitting data between the user terminal and the base station according to the configuration setpoint defining at least one neighbour terminal through which the data pass.

Abstract: A method of progressive toggling from a first frequency band to a new frequency band, first mobile nodes being previously attached to the relay node, the method including, upon detection by the relay node of interference on the first frequency band, the relay node triggers the progressive toggling which includes: a selection by the relay node of a new frequency band not suffering interference, an occupation of the new frequency band by the relay node, a blocking of access to the connection to the relay node via the first frequency band for at least one second mobile node, a toggling of the first radio communications of the first active mobile nodes from the first frequency band to the new frequency band, and a freeing of the first frequency band by the relay node.

Abstract: A method allows determination of a frequency interval for the emission, by an item of user equipment, of a signal to be sent to a base station in a telecommunications network, the frequency interval being within a predetermined frequency band over which the base station works, the method including the determination of frequency interval, wherein the determination of the frequency interval is achieved from a table of references including maximum power reduction values for the emission of a signal by the item of user equipment so that the power of the signal emitted by the item of user equipment at a predetermined out-of-band frequency is less than a predetermined maximum power limit value.

Abstract: A decision-making process is implemented by a decider processing unit. The decision-making process includes the propagation of a proposition in a distributed network of processing units, with each processing unit being provided with decision intelligence.

Abstract: A method for initializing a call for a mobile terminal including PTT applications on an IP-WAN cellular network, the method including, for each user of the mobile terminal connected to an IP-WAN modem intended to register for a group call: upon starting up the IP-WAN modem, connecting the mobile terminal to the IP-WAN cellular network; when a PTT client is active and has obtained an IP address of a PTT server, initiating by the PTT client a procedure for registering a SIP with the PTT server on a default IP-WAN carrier; performing by the PTT client a procedure for affiliation to a call group with the PTT server on the default IP-WAN carrier, and as soon as the procedure for affiliation to the call group is performed, executing an “INVITE” (SIP) procedure to RTP resources at an application level on a PTT side and on the PTT client side, to allow the establishment of the RTP session after the affiliation of the PTT client to the group.

Abstract: A method of transmission by a surveillance device to a control room, via a telecommunications network, of a series of images, includes steps, implemented by the surveillance device, of acquisition of a series of images, of coding of the series of images acquired into a series of base video frames including a first quantity of information and into at least one series of enhancement video frames of the series of base video frames, the series of enhancement video frames including a second quantity of information making it possible to enhance the quality of the series of images coded into the series of base video frames, of transmission in real time via the telecommunications network of at least the series of base video frames to the control room, and of storage of at least the series of enhancement video frames.

Abstract: A method for allocating radio resources in a wide band radio communication network for uplink communications, the network including cells, each having a base station and terminals, the method including during connection of a first terminal to a first base station of a first cell: performing reference signal quality measurements, defined respectively for the terminals of the cells by each base station, analyzing the interference detected from the first terminal on the uplink communications from the terminals connected to the base stations, the analysis being carried out as a function of the reference signal quality measurements, by each base station, allocating radio resources by the first base station for an uplink communication from the first terminal, as a function of the analysis results on detection of interference from the first terminal on the uplink communications from the other terminals of the cells, the results coming from each cell.

Abstract: A method for merging two sub-networks of an ad hoc network implementing the D2HCP routing protocol includes transmitting a first data set from the master node to the slave node, the first set including the identifiers of all the nodes of the sub-network containing the master node, the IP addresses of all the nodes of the sub-network containing the master node, each node identifier being associated with a single IP address, comparing each received IP address of the first set with the IP addresses of the routing table of the slave node in order to identify a list of duplicates corresponding to nodes of each sub-network having the same IP addresses.

Abstract: A communication method of a first device over a first radio communication link of a first communication network and a second device over a second radio communication link of a second communication network, includes a step of suspending, during a suspension time interval, transmission of a first signal by the first device over the first radio communication link; and a step of receiving, with the second device, a second signal over the second radio communication link during the suspension time interval.

Abstract: A half-duplex (HD), frequency division duplexing (FDD), method for wireless communication systems, implementing an uplink and downlink prioritization respectively for a HD-FDD type mobile communication terminal during a transition between a downlink (DL) sub-frame, labelled n, and an uplink (UL) sub-frame, labelled n+1, in order to avoid overlapping of said sub-frames. This method comprises a step of sending by a base station an allocation message, a step of receiving the allocation message by said terminal and a step of processing said allocation message by said terminal.

Abstract: A filtering device intended for being connected to a portable mobile terminal compatible with a PMR network having a wide range of receiving frequencies Bi, includes a fastening system for fastening to the mobile terminal, a first radio-frequency connector intended for engaging with a radio-frequency connector of the mobile terminal, a first channel including a first filter for filtering a first receiving useful band Bui included within the band Bi, and a second radio-frequency connector intended for engaging with a removable RF antenna to transmit or receive radio-frequency signals.

Abstract: A mobile communication terminal includes a narrow-band communication module, a broad-band communication module, a first operating module and a second operating module, the first operating module being configured in order to establish a communication through a narrow-band communication network via the narrow-band communication module, the second operating module being configured to establish a communication through the narrow-band communication network via the narrow-band communication module and in order to establish a communication through a broad-band communication network via the broad-band communication module.

Abstract: An RF receiver comprises a down-converting and sampling circuit (104) adapted to: receive an RF input signal (RFIN) having a signal band (BWRF) comprising a plurality of sub-bands (BWIF), each sub-band comprising a plurality (2K) of channels separated by frequency channel spaces (?fCH); and perform frequency transposition and sampling to generate a discrete time signal in which a selected one of the plurality of sub-bands is brought from an initial frequency band to a lower frequency band (IF20±K?fCH); and a discrete time filter (108) having a variable pass band, the central frequency (f0) of the discrete time filter being controllable to select any one of the plurality (2K) of channels of the selected sub-band.

Abstract: The object of the present invention is a method for selecting a terminal of an HD-FDD duplexing model. The invention enables the complexity of a switch of a terminal operating in an HD-FDD duplexing mode, at a level equivalent to that of a terminal operating in a TDD or FDD duplexing mode, to be reduced. To do this, thanks to the invention, it is provided that the terminal operating in an HD-FDD duplexing mode receives notifications or information via a network that programs the HD-FDD terminals through different uplink and downlink transmission models illustrated in FIG. 1. It may also be provided that the terminal operating in an HD-FDD duplexing mode has knowledge of the HD-FDD model to use for its communication. In this event, the complexity of its communication is reduced to the same level as that of a terminal operating in TDD mode.

Abstract: Method for managing the accessibility of an uplink channel, of the control channel and/or data channel type, for a communications network infrastructure with a plurality of pieces of radio equipment (SU1; SU2; SU3), in which the accessibility to the uplink channel is transmitted on a downlink channel of the network infrastructure to the pieces of radio equipment by means of status symbols indicating if access to the uplink channel is authorized during a timeslot.

Abstract: A method estimates a channel for radioelectric propagation between a transmitter and a receiver. The transmitter transmits a signal including frames that each use N1 frequency subcarriers, over each of which N1 symbols are transmitted, wherein, among the set of symbols, certain symbols, referred to as pilot symbols, are known to the receiver. The method implemented in the receiver includes; determining an overall intermediate covariance matrix M2 of the channel that embodies a time profile of the channel, which profile is symmetrical and centered on the time synchronization position, and a frequency profile of the channel, which profile is symmetrical and centered on the frequency synchronization position; calculating a vector for an intermediate channel C on the basis of the predetermined overall intermediate covariance matrix M2; and estimating the channel on the basis of the calculated vector for the intermediate channel C?.

Abstract: A method for defining a parameter value for controlling the transmission power of a set of user equipment served by a cell defined by a base station of a cellular telecommunication network, includes, for the base station, receiving, from the set of user equipment located in the cell, a set of attenuation values including, respectively by piece of equipment, an attenuation value of a signal transmitted by the base station and received by the piece of user equipment and, if the piece of user equipment is also located in a non-serving cell, an attenuation value of a signal transmitted by the base station of the non-serving cell and received by the piece of user equipment; determining, from the set of received attenuation values, a value of a parameter for controlling the transmission power; and sending, to the set of user equipment served by the cell, the value of the control parameter.

Abstract: A method for setting a direct mode communication channel of a group of terminals in a wide band radiocommunication system, the setting of the channel being assisted by at least one base station at which terminals of the group are recorded, the method including transmitting a setting request to the base station by a terminal of the group recorded at said base station, setting a direct mode communication channel by the base station by allocating free resource blocks, transmitting a setting message by the base station to the terminals, and accessing direct mode communication channel by each of said terminals for directly communicating with the other terminals of the group.

Abstract: The invention relates to a radio-communication system for Push-to-Talk applications, comprising: a narrow-band PMR-technology terminal capable of connecting, via a radio-electric interface, to a narrow-band network infrastructure for accessing, via a PTT server, a set of narrow-band PTT resources or applications; and a wide-band-technology terminal capable of connecting, via a radio-electric interface, to an IP-WAN network for accessing, via a server, a set of wide-band PTT resources or applications, wherein said terminal comprises a client PTT application on the IP-WAN network configured to establish an IP connection between the terminal and a PTT server over the IP-WAN via an interface, such that said terminal can access the narrow-band PTT resources or applications and establish a communication channel with the terminal.

Abstract: A battery sharing method to increase the service life of the batteries of PMR terminals having important uses, such as the terminal of the head of a group such as the police, firefighters, or the like, is disclosed. The technique is based on the detection of neighboring networks and/or neighboring nodes. The detection is facilitated by reiterating a selection (or reselection) of cells and a handover (HO)/vertical handover (VHO) procedure, while relaying and coordinating transmission and reception. The aim of the techniques is to improve communications as well as the duration thereof, in order to enable improved management of the battery of each terminal and to broaden coverage in areas that are not served by a network.