Abstract: A power amplification system for wireless communications monitors wireless signal sequences for worst case or problematic data patterns likely to cause the output voltage of a voltage converter supplying the power amplifier to drop. The signal sequences, which may be data within a single timeslot or data packet or across several timeslots or data packets, are detected by monitoring data patterns, either alone or in conjunction with monitoring voltage, current, or a combination of voltage and current drawn by the power amplifier. Upon detection of triggering signal sequences, the output power level is reduced, either digitally by dropping the output power one or more power levels or in an analog fashion by reducing reference voltages. Monitoring and control units may be included within the voltage converter, the power amplifier, a baseband modulator, and/or a transmission line-up unit.

Abstract: Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not significantly degrade performance in additive white guassan noise (AWGN) conditions using a transmission architecture that incorporates a form of phase sweep transmit diversity (PSTD) referred to herein as biased PSTD. Biased PSTD involves transmitting a signal and a frequency swept version of the same signal over diversity antennas at different power levels. By transmitting the two signals at different power levels, the depths of nulls normally seen in AWGN conditions when PSTD is utilized is reduced and performance degradation in AWGN conditions is mitigated.

Abstract: A radio base station apparatus may include two diversity antennas spaced apart by a distance that allows space diversity, with each diversity antenna functioning as an adaptive array antenna. Each diversity antenna has a corresponding transmitter that includes a calculator that calculates a transmission weight from one of (i) a reception weight determined based on an uplink signal and (ii) direction of arrival information. Each transmitter also has a multiplier that multiplies only a transmission signal for a channel to a specific user by the transmission weight. Also, each transmitter has a transmit power controller that controls the transmit power of the transmission signal, multiplied by the transmission weight, in accordance with a transmit power control signal.

Abstract: In a PLL circuit, the number of LPFs is reduced to one to reduce mounting area and pin number, and to simplify design. In one embodiment, the PLL circuit includes a variable-gain phase comparator, a mixer, an LPF, VCOs, couplers, and a control circuit to controlling the on/off operation of the VCOs. The variable-gain phase comparator is capable of varying a phase difference gain. The on/off of the operation of the VCOs is controlled by the control circuit so that one of the VCOs is turned off. The phase difference conversion gain is varied in accordance with the sensitivity of the VCOs so the number of LPFs required for the PLL circuit can be reduced to only one.

Abstract: A digital receiver unit (28) having a backup energy source (214) for use in a vehicle (250) that operates on a primary energy source (216) includes a receiver (203) powered by the primary energy source when the vehicle is operating, a switching mechanism (210 and 212) for switching the receiver between the primary energy source and the backup energy source and a controller (210) coupled to the receiver for controlling the switching mechanism. The receiver receives data during a scheduled predetermined time and the backup energy source powers the receiver during the scheduled predetermined time if the vehicle is not operating.

Abstract: The invention relates to a method for implementing a service in a digital multiple-service network comprising an exchange, a first telecommunication terminal connected to the multiple-service network via a first interface and a second telecommunication terminal connected to the multiple-service network via a second interface. In the method, the service is implemented using a server connected to the multiple-service network via a third interface, and the service information is transmitted to the second telecommunication terminal using channels reserved for signalling and a signalling protocol between the terminals and the exchange and between exchanges that comprises a limited amount of information not belonging to the call.

Abstract: In an Intelligent Network, a Service Interaction Media (SIM) device comprising a call handler and a plurality of service code tables manages multiple and simultaneous communications between a service input node such as a Service switching Point (SSP) and at least one network element. The service code tables contain decision information and lists of service interaction scenarios to enable the call handler to manage queries and sessions with network elements. An incoming query is presented from the switch to the SIM through the call handler and the SIM derives a service code based on query information to apply appropriate features and services to the query.

Abstract: In a PLL circuit, the number of LPFs is reduced to one to reduce mounting area and pin number, and to simplify design. In one embodiment, the PLL circuit includes a variable-gain phase comparator, a mixer, an LPF, VCOs, couplers, and a control circuit to controlling the on/off operation of the VCOs. The variable-gain phase comparator is capable of varying a phase difference gain. The on/off of the operation of the VCOs is controlled by the control circuit so that one of the VCOs is turned off. The phase difference conversion gain is varied in accordance with the sensitivity of the VCOs so the number of LPFs required for the PLL circuit can be reduced to only one.

Abstract: A method and system of periodically measuring the signal strength fluctuations in a wireless connection between a portable computer system and a wireless network. The portable computer system has a main processor and a DSP (digital signal processor). The DSP receives instructions from the main processor for controlling the periodic measuring, and subsequent thereto is placed in low power mode. The main processor is placed into a low power mode after sending the instructions. The DSP periodically awakens to measure the signal strength fluctuations while the main processor remains in a low power mode. When the signal strength fluctuation is unacceptable, this triggers the DSP to awaken the main processor. When the signal strength fluctuation is acceptable, the DSP returns to a low power state until the next periodic measuring.

Abstract: A method for enhancing an intelligent network service and an intelligent network including service switching points and at least one service control point, the intelligent network being adapted to initiate an intelligent network service when detecting at a service switching point a detection point defined by a call state model and triggering a service, and the intelligent network being further adapted to set at the service switching point, as a response to the initiation of an intelligent network service at one of the detection points, one or more detection points to trigger or not to trigger one or more intelligent network services.

Abstract: An apparatus for supplying power to a mobile phone by utilizing an external power source when a battery of the mobile phone has been exhausted. In a mobile phone having an earphone-microphone connector which can be connected with an earphone-microphone set, the earphone-microphone connector has additional contacts through which external power can be supplied to the mobile phone from an external power source, especially from another mobile phone. Therefore, even when the battery of the mobile phone has been exhausted, a user can make communication through the mobile phone by utilizing external electric power in a simple and easy manner, without largely changing the existing construction of the mobile phone.

Abstract: Transmission and reception device for a mobile radio base station comprising a plurality of transmission and reception units and hence a plurality of carriers, the transmission and reception units being accommodated in push-in modules and each having a modulator (10), a channel frequency device (19) and an output stage (20). At least some of the push-in modules comprise two full transmission and reception units having a first and a second transmission branch (1, 2). The two transmission branches (1, 2) are connected to a transmission connection (4) via an incorporated hybrid combiner (3) in order to provide two mutually combined carriers in a first mode of operation for relatively high capacity. In a second mode of operation for high output power, the two transmission branches (1, 2) are additionally connected to one another by means of an internal changeover device (25, 26, 27) such that the same transmitted signal is routed at least via the output stages (20) of both transmission branches (1, 2).

Abstract: A method for assigning access information for a teleconference to a group of conferees comprises assigning a conference I.D. number to the group of conferees, and dividing the conference I.D. number into a first portion and a second portion. An input sequence is derived from the first portion of the conference I.D. number and assigned to the group of conferees. A PIN is derived from the second portion of the conference I.D. number and assigned to each conferee of the group of conferees. In another embodiment, a teleconferencing bridge includes a programmable device effecting a sequence of instructions comprising receiving information derived from a first string of digits entered by a conferee, receiving a PIN entered by the conferee, deriving, from the PIN and a portion of the information derived from the first string of digits, a conference I.D. number, and validating the conference I.D. number.

Abstract: In a transmission output stage for a multifrequency mobile telephone, the transmit signal of operation at the low frequency is generated by a push-pull output stage which is operated in single-ended mode for generating the transmit signal at the higher frequency.

Abstract: A method and system enable optimization of trunk group design in a public switched telephone network (PSTN). A community of interest, including two end offices connected by a direct trunk and at least one tandem switch, is identified using out-of band signaling data collected from the PSTN. An application server interfaced to the PSTN determines whether traffic in the community of interest passes through the tandem switch during a predetermined time period. When traffic passes through the tandem switch, the application server further determines whether the direct trunk between the end offices experienced an overflow condition during the same predetermined time period. When the direct trunk did not experience an overflow condition, an exchange code associated with the traffic passing through the tandem switch is designated as a misrouted code. The misrouted code is flagged so that associated traffic is redirected through the direct trunk.

Abstract: A method and system for providing a dialed digit unlock and edit feature for a digital telephone connected to an advanced intelligent network (AIN) wireline network is disclosed. The digital telephone sends at least one digit of a called party number to an originating ISDN switch. The originating ISDN switch determines whether a Q.931 CALL PROCEEDING call control message has been sent from the originating ISDN switch to the digital telephone. If so, then the dialed digit unlock and edit feature is disabled. However, if the Q.931 CALL PROCEEDING call control message has not been sent, then the originating ISDN switch determines whether a key to enable the dialed digit unlock and edit feature has been entered on the digital telephone. If the key has been entered, then the last digit(s) entered for the called party number are erased and the originating ISDN switch awaits a new digit(s) to be entered into the digital telephone.

Abstract: A call center (100) rejects further calls when the sum of the present time, the anticipated call in-queue wait time (112), and the anticipated call service time (114) for this type (106-108) of call exceeds the closing time of the call center. The call center may redirect the rejected calls to another call center if it determines that the other call center can service them by its closing time.

Abstract: To provide a wristwatch type wireless telephone improved in terms of handling in that there is no need to change the holding state of the wristwatch type wireless telephone when the wristwatch type wireless telephone is used for telephone conversation by being removed from an arm and held in a hand. In a wristwatch type wireless telephone carried by being worn on an arm by binding with an arm band, a sound radiating hole of a mouthpiece and a sound receiving hole of an ear piece are formed in a surface at a back surface, at the arm side in a state of being worn on an arm.

Abstract: This invention is comprised of a telephone exchange having a memory for storing a telephone number and a personal data corresponding to the telephone number; a telephone set stored in the telephone exchange; and a portable information terminal having a memory for storing the telephone number and personal data corresponding to the telephone number, wherein when the portable information terminal is installed in the telephone set, the content in the memory in the telephone exchange is collated with the content in the memory in the portable information terminal and the contents in both memories are coincided to each other.