Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, the deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, the deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, the deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: A method of random access by a user to a resource shared according to a protocol of the ALOHA type. If the instant of transmission of a data packet for a user that is supplied by at least one first random variable conflicts with time ranges of access to the resource that have been the object of prior booking, the random variable is temporarily modified into a modified second random variable of the same mean and greater variance as the at least one first random variable.

Abstract: A method of estimating a downlink channel between a base station and a mobile terminal in a mobile telecommunication system. In the method the base station estimates the uplink channel between the mobile terminal and the base station, deduces, from the variations in the uplink channel, variations in the down link channels, makes an initial estimation of the down link channel at a first instant, and estimates at a second instant the downlink channel from the initial estimation at the first instant and variations in the downlink channel between the first and second instants.

Abstract: Allocation method for allocating transmission resources to a plurality of communications between a base station and a plurality of mobile terminals in which, for a communication with a given mobile terminal, a transmission resource allocation criterion is selected from amongst a plurality of predetermined criteria, the selection of the said criterion being made using a quantity characteristic of the propagation losses between the said mobile terminal and the base station.

Abstract: Method of obtaining a transmission gain function by means of an array of antennae, a signal to be transmitted by the array being weighted by a vector ({overscore (b)}d) of N complex coefficients, referred to as the transmission weighting vector, N being the number of antennae in the array, the array transmitting to a telecommunication terminal over a transmission channel, referred to as the downlink channel, a downlink transmission signal (Sd) and the said terminal transmitting to the said array over a transmission channel, referred to as the uplink channel, an uplink transmission signal (Su), the said downlink channel being disturbed by an isotropic noise (N?) and/or a directional noise, referred to as the downlink interference (Id), the said transmission weighting vector ({overscore (b)}d) being determined by means of a matrix product from a noise power matrix (Dd) which is a function of the power of the said isotropic noise and/or of the power of the said directional noise and a vector ({overscore (Cd)}),

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: A system for controlling the transmission power of a base station configured to communicate with mobile stations, wherein the base station includes power command units configured to receive signals intended for mobile stations and power command signals sent by mobile stations, summation units configured to form sub-composite signals of input signals having a given priority level transmitted by the power command units, attenuation units configured to attenuate the sub-composite signals transmitted by the summation units by applying attenuation coefficients, and a summer configured to form a composite signal to be transmitted to mobile stations from the signals transmitted by the attenuation units.

Abstract: A simulation method for the resolution of the power control convergence problem. The power to be transmitted by each mobile station and each base station to assure a proper Qos in the system are computed in an iterative way. At each iterative step, the powers to be received are derived from the level of interference received at the previous iterative step by each network element. Once this is done for each network element, the interference levels are then refreshed. The iterations stop when the biggest gap between estimated and observed interference levels is below a given threshold. One embodiment includes deriving in one step all the power levels to be transmitted by one base station towards many users, assuming a given stable extra cell interference level. In addition, the invention includes a method for taking the dynamic range of power control in both uplink and downlink, and a method for simulation of power control while in the soft handover.

Abstract: A method of simulating operating conditions of a telecommunication system including computing at least one value of an interference parameter of at least one mobile transceiver, the interference parameter being indicative of an amount of interference affecting a communication between the mobile transceiver and an associated radio base station, identifying radio base stations and mobile transceivers that generate a significant amount of interference affecting the communication, and selecting data of radio base stations and mobile transceivers identified during the identification step for an execution of the computing step.

Abstract: A method for determining an antenna beam angle for base stations of a radiotelecommunication system, notably of the cellular mobile radiotelephony system type. Each of the base stations defines a cell and has a transmission and reception antenna whose beam covers a sector in which mobile units can communicate with the base station. The antenna beam can be inclined, so as to modify the sector covered, via a dynamic antenna beam inclination control method. That method includes the steps of determining, a priori, an optimum inclination that is optimum in relation to the sector covered; estimating a cell load of the cell at a given instant; determining an instantaneous inclination at the given instant, as a function of the optimum inclination and the estimated load; controlling an instantaneous inclination of the antenna as a function of the instantaneous inclination determined.

Abstract: The present invention relates to a method and a system for reducing the dead zones within a third generation mobile telecommunication system (UMTS). When a mobile station (MS) communicating with a service base station (BS1) generates a dead zone on at least one uplink of a next base station (BS2), criteria are determined, according to the invention, based on parameters regarding the uplink and/or downlink between the mobile station (MS) and the base station (BS1) which, if they are not complied with for the uplink and/or downlink, trigger a radio link interruption in the mobile station (MS). When the power transmitted on the uplink becomes zero, the degradation in the radio coverage of the cell associated with the next base station (BS2) due to the mobile station (MS) disappears.

Abstract: A method and a system of reducing the dead zones in a third-generation mobile telecommunication system (UMTS). When a mobile station MS in communication with a base station BS1 gives rise to dead zones on the uplinks of a base station BS2, then according to the invention, criteria on the uplink and/or the downlink between the mobile station MS and the base station BS1 are defined which, if one or other of the two are not complied with, triggers a procedure of radio link failure in the mobile station MS. The communication between the mobile station MS and the base station BS1 is then released. The power transmitted on the uplink by the mobile station MS then becomes zero and the degradation of the radio coverage of the cell of the base station BS2 due to the mobile station MS disappears.

Abstract: A method of reducing base station overloading consists of a series of sequential steps, beginning with reducing the decibel size of the handover window, base station exclusion, only one base station being excluded at a time, mobiles not in soft handover not being excluded, and if more than one base station in the active set is overloaded, excluding the station which has the strongest received power from the active set.

Abstract: A telecommunication system for mobiles of the type which has a network of base stations to which the mobiles can be connected and which is designed so that a mobile connected to a base station sends to the base station, besides user signals, power control commands in order that the base station controls its own transmission power so that the power received therefrom by the mobile is equal to a predetermined value. Each base station to which the mobile is connected regularly transmits, to the base stations to which the mobile is liable to be connected during a handover phase, the mean value of its transmission power. A base station, at the moment of the start of the handover phase, deduces, from the mean value and from the power control commands it receives from the mobile, the instantaneous value of the power emitted by the initial base station or stations at this moment and initializes its transmission power to a value derived from the instantaneous power.

Abstract: The invention concerns a method and a device for receiving a signal transmitted by a source with a plurality of antennas, in which a plurality of beam signals are obtained by weighting the signals received by the different antennas. The beam signals are correlated with the replica of a reference signal transmitted by the source and then combined by means of coefficients obtained from correlation results.

Abstract: Method of obtaining a transmission gain function for an array of antennae communicating to a telecommunication terminal. The method includes determining a first weighting vector {overscore (b)}u maximizing on reception by the array a ratio (C/(Iu+Nu))u of a received signal coming from the telecommunication terminal to a noise plus interference disturbing an uplink channel, and calculating from the first weighting vector {overscore (b)}u a second weighting vector {overscore (b)}d maximizing on reception by the telecommunication terminal a ratio (C/(Id+Nd))d of a received signal coming from the array to a noise plus interference disturbing the downlink channel. The second weighting vector is in the form of a matrix product including a first noise matrix Du which is a function of a power of the first isotropic noise and/or a power of the first directional noise and a second noise matrix Dd which is a function of a power of the second isotropic noise and/or a power of the second directional noise.

Abstract: A method and apparatus for estimating the speed of relative movement of a transmitter and a receiver which are in communication with each other in a telecommunications system. The transmitter and receiver are in communication via a channel of the telecommunications system by a carrier wave. An analysis is made of the variations of amplitude or power of the signal transmitted by the transmitter and the channel between the transmitter and the receiver. The dopler shift undergone by the carrier wave is deduced from the variations, and the speed of movement is thereby deduced.