Abstract: A method of allocating communications resources in a radio communications system comprising a first subsystem (1) and a second subsystem (2) using different radio access techniques and adapted to communicate with radio terminals (3). The method comprises the following steps: determining an indication about the occupancy of the communications resources of said first and/or said second subsystem, and when a call is to be set up for a radio terminal, allocating a communications resource of the first or second subsystem to the call taking account of the indication so determined.

Abstract: The mobile terminal according to the invention comprises: means for receiving synchronization signals from a base station of a radiocommunication system; means for sending towards the base station requests for access to communication resources, at respective instants clamped with respect to instants of reception of said synchronization signals; means for determining a level of remoteness with respect to the base station; and means for advancing the instants of sending of the requests for access to communication resources, as a function of the level of remoteness determined by the means for determining a level of remoteness with respect to the base station.

Abstract: A device is intended to repeat radiofrequency signals that must be exchanged between a station of a radio communication network and a communication terminal located within a space enclosed by walls. This device comprises an external repeater intended to be placed on the outer surface of a wall and comprising first electromagnetic coupling means coupled to first RF signal transmitting and/or receiving means, and an internal repeater intended to be placed on the inner surface of that same wall substantially facing the external repeater and comprising second electromagnetic coupling means coupled to second RF signal transmitting and/or receiving means. The first and second electromagnetic coupling means are configured so as to transfer, over waves, and through the wall, RF signals originating respectively from the first and second RF signal transmitting and/or receiving means.

Abstract: The invention concerns a communication system comprising a radio unit, several terminal facilities and a local administration server. The radio unit comprises a first communication interface with the terminal facilities, a second radio communication interface with a cellular network, a module for identifying a subscription to the cellular network and device for handover of multiple user streams between the cellular network and the respective terminal facilities connected to the first interface when the subscription is identified by said module. The local administration server comprises device for communication with the terminal facilities, independent of the cellular network, to supervise the exchanges over the first communication interface.

Abstract: Method of allocating communication codes to channels set up in respect of mobile terminals in communication in a cell of a radiocommunication system, in which the cell is served by a fixed station having means of adjustment of send/receive parameters defining a respective antenna pattern in respect of each mobile terminal in the cell, in which the allocated communication codes form part of a set of codes some at least of which are mutually orthogonal. In response to channel setup or reconfiguration request in respect of a first mobile terminal in the cell, the allocation to the said channel of a code nonorthogonal to at least one code of the set already allocated to another channel set up in respect of a second mobile terminal in the cell is conditionally admitted, as a function of a comparison between the send/receive parameters determined in respect of the first and second terminals.

Abstract: Parameters of radio propagation between a mobile terminal and at least one fixed transceiver are measured. Report messages indicating at least a part of the measured parameters, in accordance with a mode of reporting specified by the radio network controller are transmitted to the radio network controller. An estimate of speed of movement of the mobile terminal is obtained at the radio network controller. The report messages are processed at the radio network controller so as to determine, by taking account of the said estimate of speed, a mode of reporting to be specified for a part at least of the report messages.

Abstract: The present invention relates to a method for establishing a secured communication session in a communication system between a user using an untrusted device and a server. According to the present invention the user first obtains an authentication algorithm and an encryption algorithm and then creates a session key. Next the user obtains a public key of the server and sends a personal identity number to the server for authentication by using the authentication algorithm, the personal identity number being encrypted by using the encryption algorithm and the public key of the server. The user also sends the session key to the server for encrypting purpose between the user and the server, the session key being encrypted by using the encryption algorithm and the public key of the server.

Abstract: The method seeks a high-performance detection of a signal burst transmitted on the initiative of a sender on a radio channel listened to by a receiver system. The transmitted burst represents a predetermined digital sequence, serving for example to request access to a radio system or to ensure the synchronization of a radio interface. Channel parameters representing a statistical behavior of the radio channel are estimated and a detection magnitude is evaluated on the basis of the estimated channel parameters and of a correlation between a signal received at the receiver system and the predetermined digital sequence. The estimated channel parameters comprise moments of order greater than 2 of the gain on the radio channel.

Abstract: In a spread spectrum digital radiocommunication receiver, a first estimate of a symbol transmitted by a sender is calculated by applying to a radio signal received a processing taking into account a number N of propagation paths from the sender, a parameter of reliability of the first estimate is evaluated, and when the reliability parameter evaluated does not satisfy a confidence criterion, a second estimate of the symbol is calculated by taking into account at least one (N+1)-th propagation path from the sender in the processing applied to the radio signal received.

Abstract: The present invention relates to a method for securing a radio communication link establishment in a radio communication network comprising a local network and a secured network. The local network comprises at least a first terminal and a second terminal and at least the first terminal is capable of communicating with the secured network. The radio communication network implements layered protocol functions, comprising at least Layers 1, 2 and 3, the terminals being identifiable by their Layer 2 and 3 addresses. The secured network comprises a database comprising address correspondence information between Layer 2 and 3 addresses of terminals. In the method the first terminal authenticates itself with the secured network and then by using the Layer 3 address of the second terminal, obtaining the address correspondence information provided by the database and thereby determining the corresponding Layer 2 address of the second terminal.

Abstract: A method for transmitting a signal carrying information elements over a plurality of frequency subcarriers simultaneously. The method comprises: identifying a set of at least one frequency subcarrier of the plurality particularly subjected to attenuation; and transmitting the signal simultaneously over said plurality of frequency subcarriers by assigning respective information elements to the frequency subcarriers of the plurality not belonging to said set and assigning to each frequency subcarrier of said set a respective coefficient set so that an envelope of the transmitted signal is less than an envelope of the signal that would be transmitted by assigning respective information elements to all the frequency subcarriers of the plurality.

Abstract: Several versions of the radio signal are transmitted with different polarizations from a first station to a second station. The respective transmission powers of these versions of the radio signal are adaptively controlled according to measurements carried out by the first station on signals transmitted by the second station.

Abstract: A method for configuring a node, said node holding a public key depending on an identifier relating to said node, a related secret key and an address of a configuration server storing sets of configuration parameters for respective nodes, the method comprising the following steps carried out at the configuration server: identifying said node by use of an identity based identification algorithm taking account of said public and secret keys; and when said node has been successfully identified, retrieving the set of configuration parameters stored for said node and transmitting said set of configuration parameters to said node.

Abstract: The invention relates to a method of estimating symbols carried by a digital signal that is received by a receiver over a communication channel (5), said symbols being multiplexed on orthogonal frequency sub-carriers. The inventive method comprises the following steps in relation to each symbol carried by the digital signal, consisting in: performing at least two transforms towards the frequency domain (8,9) on a portion of the received signal essentially corresponding to the symbol, said transforms being performed with a determined time lag (10) therebetween; estimating the parameters (r0, r1, . . . , rn, r?0, r?1, . . . , r?n) of the communication channel from pre-determined binary information contained in the digital signal; and estimating the symbol from a combination of the result of each of the transforms performed and the estimated communication channel parameters.

Abstract: The radio network controller estimates respective attenuation ratios of radio signals received by a terminal from transmitters of an active set. It commands at least some of the transmitters of the active set to transmit to the terminal with respective powers such that the difference pi-pj between the respective transmission powers pi and pj of two transmitters i and j is substantially proportional to 1 L j - 1 L i , where Li and Lj designate the attenuation ratios estimated for the transmitters i and j, respectively.

Abstract: The invention relates to a method of controlling security in a communication system comprising at least one node (1,1?,A-D) capable of routing traffic according to a plurality of security algorithms (9,9?) with respective security levels. The method comprises an estimation of at least one safety degree relating to said node, a selection of at least one security algorithm of said plurality, depending on said estimated safety degree, and an activation of said at least one security algorithm.

Abstract: The invention proposes a method for securing an interaction between a first node and a second node, wherein a security algorithm belonging to both a first set of security algorithms held by the first node and a second set of security algorithms held by a third node is selected to secure the interaction between the first and second nodes, the selection of said security algorithm taking account of capacities of both the first and third nodes.

Abstract: The invention concerns a base station (100) comprising a transmission antenna (1) consisting of several radiating elements (2) for transmitting one or more radio signals (E1, E2, , EN) to one or more addressee terminals (200). Said radio signals are generated from signal components (S1, S2, , SM) to which are applied phase shifts (D1, D2, , DN). The adjustment of said phase shifts brings about a systematic fluctuation of at least one transmitting direction of the antenna during the transmission of the radio signal, so as to provide diversity of propagation paths.

Abstract: The invention concerns the dynamic reservation of resources according to the RSVP protocol for transmitting an application flow in the form of first packets between a radio terminal and a remote unit interconnected via a first IP network and a cellular radio communication system. The cellular radio communication system uses a second IP network, or even a third IP network, in its core network. According to the invention, the dynamic reservation of resources in the first IP network is completed by a second dynamic reservation of resources in the second IP network, and where necessary a third dynamic reservation of resources in the third IP network. For this, transmission elements of the cellular radio communication system perform the association between the tunnel identity used for transmitting the first packets of the application flow and the parameters assigned to each RSVP session.

Abstract: The method measures the time of arrival at a radiocommunication receiver of a received radio signal originating from a transmitting station. A received signal component is stored in a memory of the receiver. An estimation of the information bits carried by the signal component is obtained through demodulation of the signal component by the receiver. The estimation of the time of arrival of the signal is carried out on the basis of the bits thus estimated and the received signal component.