Abstract: In a cellular mobile telecommunications system, upon a hand-off request signal generated by a mobile station, the base station control office transfers traffic data to both the base station to which the mobile station is presently connected and another base station to which the present base station is adjacent. A hand-off order message is transferred from the present base station toward the mobile station. The control office is adapted to control the adjacent base station to transmit the hand-off order message if it fails to receive a hand-off confirmation from the mobile station.

Abstract: Signal transmission system includes a processor (SEPAR) for isolating an estimate (IL) for at least one wanted signal (XL) contained in at least one mixed signal (Ea). At least one sensor (Ma) detects the mixed signal which includes at least the wanted signal (XL) and at least two correlated interference signals (Pa, Pb) generated in response respectively to two correlated electric signals (CRa, CRb). The processor (SEPAR) receives on the input the detected mixed signal (Ea) and the two correlated electric signals (CRa, CRb). By decorrelating the estimate (IL) relative respectively to the correlated electric signals (CRa, CRb), the processing means extracts the estimate (IL) of the wanted.

Abstract: A power control circuit for use with a closed loop transmitter such as a cellular telephone. The inventive circuit includes a first element for providing a transmitter output signal. A second element serves to receive a power level signal. A third element is included for adjusting the transmitter output signal in response to the power level signal in accordance with a first scale factor over a first range if the power level signal is below a first threshold and for adjusting the transmitter output signal in response to the power level signal in accordance with a second scale factor over a second range if the power level signal is not below the first threshold. In the illustrative embodiment, the system is adapted for use in a mobile station of a cellular telephone system to which a power level control signal is supplied by a base station thereof. The first element is a variable gain amplifier, the second element is a microprocessor.

Abstract: The invention provides a network paging system that includes a method and apparatus for sending messages to a subscriber. When one party attempts to contact another party, via a page message for example, the system may determine if the paged party is logged onto the network system. If the paged party is logged onto the network, the page message may be sent to the paged party's personal computer. If the paged party is not logged onto the network, the page message may be sent to the paged party's pager. Advantageously, the invention eliminates the need or expense of sending a message both via the Internet and a pager.

Abstract: A signal combining device and method allows a mobile unit to use a single antenna to receive and transmit information in two or more frequency ranges. The combining device includes a first and second transmitting circuits and a first and second receiving circuits, which are connected to a matching device. The matching device, in turn, is connected to the antenna. The first transmitting circuit and the first receiving circuit are designed to transmit and receive, respectively, a digital signal, and the second transmitting circuit and the second receiving circuit are designed to transmit and receive, respectively, an analogue or a digital signal. By using the signal combining device it is possible to combine signals of different frequency bands, especially digital signals and analogue signals of different frequency bands. As such, the present invention allows for the use of a common antenna in a dual mode radio.

Abstract: An appliance has an indicating device, means forming an outer surface provided with a throughgoing opening for receiving the indicating device, means forming an edge region which surrounds the throughgoing opening and is depressed, the edge region being formed so that the decorative part is inserted in the edge region, and a releasable connection between the decorative part and the edge region.

Abstract: A receiver (100) provides dual band features by providing two signal paths (106, 108) off an antenna (102), one for UHF operation (106) and one for VHF operation (108). The two signals paths (106, 108) feed into a single broadband input (124) of a direct conversion receiver (114). The UHF path (106) utilizes UHF front end circuitry (110) while the VHF path (108) is implemented with a loading/isolator circuit (120) and a matching circuit (122). The loading/isolator circuit (120) loads the antenna (102) and isolates UHF signals while the matching circuit (122) provides a match between the loading isolator circuit (120) and the direct conversion recover (114). Selectable matching circuitry (126, 128) and selectable VCO circuitry (132, 134) configures the direct conversion receiver for the UHF or VHF mode of operation.

Abstract: Implementing a method for a handover between mobile switching centers (MSC-A, MSC-B) of a cellular mobile network in high-speed data transmission wherein several channels are allocated to a mobile station (MS). In the method, the first mobile switching center (MSC-A) indicates to the second mobile switching center (MSC-B) at least the minimum number of channels required over the connection. The second mobile switching center (MSC-B) attempts to allocate at least the indicated minimum number of channels. The second mobile switching enter (MSC-B) transmits to the first mobile switching center (MSC-A) data about the channels it has allocated and at least one handover number (HON). The first mobile switching (MSC-A) may use the same handover number (HON) to perform a handover to each subchannel. According to a preferred embodiment of the invention, as many handover numbers (HON) are allocated directly as there are channels allocated to the connection.

Abstract: In order to select one or more microwave signals from among the signals which it receives, the reception device comprises switching circuits. The switching circuits are commanded by command signals. According to the invention, a switching circuit command signal consists of at least two sinusoidal signals generated according to the principle of voice-frequency dialling. The invention applies more particularly to the reception of signals from telecommunication and/or telebroadcast satellites.

Abstract: Techniques and architecture as well as channel multiplexing schemes to design and implement multi-megabit and gigabit transfer of data in situations requiring or optimized by wireless communication systems are presented as a method by which the high-speed signal integrity of a transmission may be maintained over a hostile wireless link and by which a high-speed transmission may be made while maintaining a bit-rate below the delay spread value such that the unforgiving propagation conditions normally associated with high-speed transfer are mitigated. The system is adaptable to any use where a multi-megabit and gigabit wireless link is desirable; for example in office buildings lacking fiber infrastructure, in rapid deployment situations such as those required in military or emergency situations, or where other separate broadband infrastructures do not exist to the end users for integrated telephone, Internet, and digital data systems.

Abstract: An apparatus and method reducing interference between multiple frequency modulated, FM, voice transmissions present in the same frequency bandwidth by receiving a radio signal which includes a first FM voice signal to be demodulated along with one or more additional FM voice signals which are present within a modulation bandwidth of the first FM voice signal, detecting the presence of a carrier frequency signal of the first FM signal and determining a lack of modulation of the detected carrier frequency signal by a voice signal, and squelching the received signal when the carrier signal is unmodulated.

Abstract: An overlay to an existing cellular switching structure to provide post-second generation services without the need to make modifications or updates to the existing infrastructure is disclosed. The overlay preserves second generation switching while providing post-second generation services.

Abstract: In a cellular telecommunications network, geographical restriction is stored for a mobile subscriber in the subscriber's record (100A, 100B, 100C, 100D) in a database at a node of the network, preferably at a home location register [HLR] (24). In accordance with one mode of the invention, the mobile station is permitted to operate only in cells identified in the subscriber's record in the HLR. In accordance with this mode, only applicable cells listed in the subscriber's record are paged when a call is direct to the mobile station, and the mobile station can only originate calls and sustain calls from such cells. In a variation of this mode, calls originated by the mobile station in the applicable cells listed in the subscriber's record can be sustained when the mobile station travels into non-applicable cells. In accordance with another mode known as “soft” restriction, a first (e.g.

Abstract: A universal hands-free receiver for a mobile telephone includes a base, an adjusting device slidably mounted on the upper portion of the base, an upper holder fixed on the adjusting device to move therewith and having an upper receiving space formed in the bottom thereof, and a lower holder fixed on the lower portion of the base and having a lower receiving space formed on the top thereof opposite to the upper receiving space. In such a manner, the adjusting device is able to move on the base so as to adjust the distance between the upper holder and the lower holder such that the distance between the upper holder and the lower holder is adjustable so as to suit the mobile telephones of different length.

Abstract: A system for amplifying output transmitted power of a mobile battery powered radio transceiver includes a secondary voltage source, multiple power amplifiers, a central processing unit to control the amplification of the output transmitted signal, and a switch to detect the presence of the radio transceiver. The system includes a method for compensating for the signal loses associated with cabling used in the installation of the amplifying circuitry in an automobile application. According to the first preferred embodiment of the present invention, the method for compensating for signal losses is a manually configured bank of switches. When the amplifying circuitry is installed in the automobile application, the bank of switches is set to specify the amount of loss compensation needed. Multiple amplifiers are used for amplification of the output transmitted signal when the radio transceiver is operating at different frequencies.

Abstract: A method for operating a dual-band mobile station (10) includes a first step of (a) storing information in the mobile station. The stored information includes an ordered list of frequency bands (Band Order Table 24A). For example, at least one frequency band is an 800 MHz frequency band and at least one other frequency band is a 1900 MHz frequency band. The stored information further includes an identity (24B) of a band wherein an acceptable control channel was last located. A next step (b) is executed in response to a user invoking a search procedure to locate a new non-public system. This step accesses the memory to determine the identity of the band wherein an acceptable control channel was last located, and marks this band as a band to be searched. A next step (c) collects signal strength measurements on channels in the band to be searched and executes a channel search procedure to locate a control channel of a desired non-public system within the band to be searched.

Abstract: A home location register (HLR) and method of routing a call directed to a portable directory number in a radio telecommunications network. The network includes an originating mobile switching center (O-MSC) and a Number Portability Database (NPDB). The O-MSC first sends a Location Request (LOCREQ) message to the HLR requesting a routing number. The LOCREQ message includes a dialed directory number. The HLR determines whether a routing number is assigned to the dialed directory number. If not, the HLR sends a Number Portability Request (NPREQ) message to the NPDB and includes the dialed directory number. A location routing number (LRN) assigned to the dialed directory number is then retrieved from the NPDB and sent to the HLR. The HLR forwards the LRN to the O-MSC, which then routes the call to the LRN.

Abstract: A portable radio device including a frequency synthesizer 5 for producing a local signal for radio section, a digital control circuit 6 for digitally controlling a portion of or the entirety of the radio device, and a reference signal generator 1 which operates the frequency synthesizer and the digital control circuit, wherein a buffer amplifier 2 is provided between the reference signal generator and the digital control circuit, and switching means 4 is provided in parallel with the buffer amplifier between the reference signal generator and the digital control circuit. When the frequency synthesizer is inactive, the switching means is activated, and a power supply 3 of the buffer amplifier is deactivated. As a result, the power dissipated by the buffer amplifier can be reduced without deteriorating the characteristics of the frequency synthesizer.

Abstract: An antenna malfunction detecting system, which comprises a plurality of detectors for detecting voltage values of a standing wave, caused by a reflected wave occurring at a trouble point of an antenna system, at different detecting points, is realized for obtaining precise detection result of malfunctioning. Each wave detector for detecting voltage values of the standing wave is connected to each output of a distributor, connected to an output of a circulator which is inserted between a transmission final-stage amplifier and an antenna connector terminal, and one of then is connected via a &lgr;/4 strip line to detect voltage value of the standing wave in a different position of line equivalently. Thereby, an amplitude value of the standing wave caused by the antenna malfunction can be precisely detected.

Abstract: The CPS (center point stereo) system of the present invention is directed to stereo sound reinforcement of live music, particularly with electronically-implemented instruments such as guitars and keyboards that provide a musical source signal at line level. A special CPS processor, converting regular left and right stereo signals to sum and difference signals, enables a center stage acoustic image to be created directly from a forward-directed loudspeaker unit driven from the sum signal and enables left and right spatialized stereo images to be created by recombination with a difference field received indirectly from a sideways-directed special dipole loudspeaker unit conveniently co-located with the forward-directed loudspeaker unit and driven from the difference signal. The CPS processor receives L and R input from the instrument or from an interposed FX (musical effects) or DSP (digital sound process) unit receiving mono or stereo input from the instrument.