Abstract: Systems and methods are provided for determining location area of mobile user devices. In a mobile device, a first area probability as a likelihood that the mobile device is located within a first area and a second area probability indicative of the mobile device being located within a second area may be determined, with the first area probability determined based on a first probability and a second probability, and the second area probability determined based on a third probability and a fourth probability. The first probability, second probability, third probability, and fourth probability are determined based on assessing strength received in the respective area from a first base station or a second base station. A determination of whether the mobile device is located in the first area or the second area is made based on the first area probability and the second area probability.

Abstract: Systems and methods are provided for determining location area of mobile user devices. In a mobile device, a first area probability as a likelihood that the mobile device is located within a first area and a second area probability indicative of the mobile device being located within a second area may be determined, with the first area probability determined based on a first probability and a second probability, and the second area probability determined based on a third probability and a fourth probability. The first probability, second probability, third probability, and fourth probability are determined based on assessing strength received in the respective area from a first base station or a second base station. A determination of whether the mobile device is located in the first area or the second area is made based on the first area probability and the second area probability.

Abstract: A computer system determines location probabilities for defined sub-areas (41, 43) of a geographical area (4), e.g. for squares arranged in a grid (40), based on field strengths expected in the small sub-areas (41, 43) from the antennas (A1, A2 A3, A4), and based on the antenna used by the mobile communication terminal. The location probabilities indicate for a sub-area (41, 43) the probability that the mobile communication terminal is located in the respective sub-area (41, 43). The computer system determines at least one ellipse defining the location area, based on the location probabilities of the sub-areas (41, 43). The location probabilities make it possible to determine elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: A computer system determines location probabilities for defined sub-areas (41, 43) of a geographical area (4), e.g. for squares arranged in a grid (40), based on field strengths expected in the small sub-areas (41, 43) from the antennas (A1, A2 A3, A4), and based on the antenna used by the mobile communication terminal. The location probabilities indicate for a sub-area (41, 43) the probability that the mobile communication terminal is located in the respective sub-area (41, 43). The computer system determines at least one ellipse defining the location area, based on the location probabilities of the sub-areas (41, 43). The location probabilities make it possible to determine elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: Methods and systems are provided for adaptively determining location of a mobile device. Antenna probabilities for a plurality of antennas in an area covered by a mobile radio network may be determined, with the antenna probabilities being determined based on expected field strengths for the plurality of antennas in each of a plurality of sub-areas of the area; and with the antenna probabilities indicate for each antenna, in each of the plurality of sub-areas, the probability that a mobile communication terminal uses that antenna when located in that sub-area. A location area for a user using a mobile communication terminal may then be determined based on the antenna probabilities and a determination of one or more antennas used by the mobile communication termination, wherein the location area is determined without measuring signal properties at the mobile communication terminal.

Abstract: Methods and systems are provided for adaptively determining location of a mobile device. Antenna probabilities for a plurality of antennas in an area covered by a mobile radio network may be determined, with the antenna probabilities being determined based on expected field strengths for the plurality of antennas in each of a plurality of sub-areas of the area; and with the antenna probabilities indicate for each antenna, in each of the plurality of sub-areas, the probability that a mobile communication terminal uses that antenna when located in that sub-area. A location area for a user using a mobile communication terminal may then be determined based on the antenna probabilities and a determination of one or more antennas used by the mobile communication termination, wherein the location area is determined without measuring signal properties at the mobile communication terminal.

Abstract: Systems and methods are provided for determining a location area of a user using a mobile communication terminal in a geographical area covered by a mobile radio network. Antenna probabilities, corresponding to a plurality of antennas located in the geographical area, may be determined for a plurality of sub-areas of the geographical area. The antenna probabilities may be determined based on expected field strengths for the plurality of antennas in each of the plurality of sub-areas, and may indicate for each particular antenna, in each of the plurality of sub-areas, the probability that a mobile communication terminal uses that particular antenna when located in that sub-area. The location area for the user may be determined based on the antenna probabilities and determination of one or more antennas used by the mobile communication termination the user is using, without requiring measuring signal properties at the particular mobile communication terminal.

Abstract: Systems and methods are provided for determining a location area of a user using a mobile communication terminal in a geographical area covered by a mobile radio network. Antenna probabilities, corresponding to a plurality of antennas located in the geographical area, may be determined for a plurality of sub-areas of the geographical area. The antenna probabilities may be determined based on expected field strengths for the plurality of antennas in each of the plurality of sub-areas, and may indicate for each particular antenna, in each of the plurality of sub-areas, the probability that a mobile communication terminal uses that particular antenna when located in that sub-area. The location area for the user may be determined based on the antenna probabilities and determination of one or more antennas used by the mobile communication termination the user is using, without requiring measuring signal properties at the particular mobile communication terminal.

Abstract: A system and a method for determining a location area of a user using a mobile communication terminal in a geographical area covered by a mobile radio network, based on location probabilities for defined sub-areas of the geographical area. The location probabilities may be determined based on, e.g., field strengths expected in the sub-areas from antennas and based on the antenna used by the mobile communication terminal. The location probabilities may indicate, for a sub-area, the probability that the mobile communication terminal is located in the respective sub-area. At least one ellipse defining the location area may be determined, such as based on the location probabilities. The location probabilities may enable determining elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: A system and a method for determining a location area of a user using a mobile communication terminal in a geographical area covered by a mobile radio network, based on location probabilities for defined sub-areas of the geographical area. The location probabilities may be determined based on, e.g., field strengths expected in the sub-areas from antennas and based on the antenna used by the mobile communication terminal. The location probabilities may indicate, for a sub-area, the probability that the mobile communication terminal is located in the respective sub-area. At least one ellipse defining the location area may be determined, such as based on the location probabilities. The location probabilities may enable determining elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: A computer system determines location probabilities for defined sub-areas (41, 43) of a geographical area (4), e.g. for squares arranged in a grid (40), based on field strengths expected in the small sub-areas (41, 43) from the antennas (A1, A2 A3, A4), and based on the antenna used by the mobile communication terminal. The location probabilities indicate for a sub-area (41, 43) the probability that the mobile communication terminal is located in the respective sub-area (41, 43). The computer system determines at least one ellipse defining the location area, based on the location probabilities of the sub-areas (41, 43). The location probabilities make it possible to determine elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: A computer system determines location probabilities for defined sub-areas (41, 43) of a geographical area (4), e.g. for squares arranged in a grid (40), based on field strengths expected in the small sub-areas (41, 43) from the antennas (A1, A2 A3, A4), and based on the antenna used by the mobile communication terminal. The location probabilities indicate for a sub-area (41, 43) the probability that the mobile communication terminal is located in the respective sub-area (41, 43). The computer system determines at least one ellipse defining the location area, based on the location probabilities of the sub-areas (41, 43). The location probabilities make it possible to determine elliptical location areas of mobile users much smaller than the area each antenna does cover physically, but without the need for measuring at the mobile communication terminal signal properties such as signal strength or observed time differences.

Abstract: The present invention relates to a power supply circuit SC receiving a power supply current IS at an input voltage VLN and intended to supply a voltage VDD, comprisinga capacitance CS,a first transistor T1 enabling the capacitance CS to be charged by means of the power supply current IS,a second transistor T2 enabling said charge to be interrupted by diverting the power supply current IS to the reference terminal VSS, anda control module T3, T4 controlling the conductance of the first and second transistors T1 and T2 as a function of the values of the input and output voltages VLN and VDD.According to the invention, the power supply circuit SC also comprises a measuring module with which the value of the power supply current IS can be controlled.

Abstract: A telephony device includes a rectifier bridge (GB) intended to be connected to a telephone line and to supply a rectified line current, an interface module (INT) permitting the transmission of signals in the direction of the telephone line and supplying an information signal (Iin), and an amplifier (AGC) whose gain is proportional to the value of a control current (Icnt) supplied by a control module (CNT). The control current (Icnt) is proportional to an exponential of a linear equation of the inverse of the value of the information signal (Iin) in order to compensate for the attenuation which the signal has undergone during its transport through the telephone line.

Abstract: A power amplifier stage for producing a rectangular signal across a load, which may be predominantly capacitive, by means of a "bridge" amplifier comprises a first pair of transistors which operate alternately as an emitter follower and a second pair of transistors which alternately closes the circuit of the load. The four transistors of the bridge amplifier are respectively driven by identical four current sources in order to minimize the impedance of the circuit of the load for direct current. The transistors of the second pair are alternately connected as diodes. To control the signal amplitude, a generator supplies a control voltage whose value corresponds to a fixed component equal to 2.V.sub.BE, plus a variable component corresponding to the desired amplitude of the signal. Such a power amplifier stage can be used for driving a piezo-electric transducer, particularly for a telephone bell.

Abstract: A telephone set having a voltage gain and control circuit element in series with the main current path of a line current control transistor, connected between first and second line end portions. The line current control transistor is connected between the first line end portion and the modulation terminal of the voltage gain and control circuit. A line current measuring resistor is connected between the reference terminal of the voltage gain and control circuit element, and the second line end portion. The rise of line current above a threshold is controlled by a second transistor connected between a threshold voltage source and the control electrode of the line current control transistor. The second transistor is also controlled by a compensating diode connected between the control electrode of the second transistor and the line current measuring resistor.