Abstract: This invention provides a method and apparatus for associating call data with particular users instead of line ports. This call data includes the last incoming and outgoing calls associated with a particular number. This allows the services such as automatic callback, automatic recall, and customer originated trace to be implemented with dynamic line assignment allowing users to maintain the same level of subscribed services at different locations. For mobile users, automatic callback, automatic recall, and customer originated trace can be implemented at the home mobile switching center as well as roaming mobile switching centers. If the mobile user is roaming, updating the call history of the mobile station at the new mobile switching center allows the mobile user to experience seamless services across a large territory.

Abstract: An amplifier provides two or more selectively enabled amplifier segments allowing a source signal to be amplified with a selectable output power. A bias circuit responsive to a bias control signal enables selectable combinations of one or more amplifier segments, thus allowing selection of a desired output power. Selecting a desired output signal power via the bias control signal corresponds to selecting an overall amplifier quiescent current that decreases with decreasing output signal power. Thus, the amplifier permits a controlling system, such as a mobile terminal (e.g., cellular telephone) to amplify a transmit signal with a selectable transmit signal output power and corresponding level of amplifier quiescent power consumption. Preferably, each segment comprises one or more transistor amplification stages which, when enabled by the bias circuit, are biased to permit maximum power linear amplification for the transmit signal.

Abstract: The location of a mobile object can be specified which lies within a radio zone range to which the range of only one base station corresponds, and a mobile object search method therefor. The mobile object search system includes a database for which is provided a mobile object tracing indication to enable the continuous monitoring of the location of a mobile object which has issued a call when a request for location information concerning the mobile object is transmitted to a switchboard in a mobile service system; mobile object tracing means for registering a mobile object display in the data base; and mobile object location monitoring means for repeatedly monitoring the location of the mobile object, and for using a notification of a change in the location of the mobile object by a minimum control area unit which the mobile object communication network recognizes. The minimum control area unit is a radio zone for one base station.

Abstract: In a route-adaptive on-demand radio communication system, a program selector (15) selects, from a plurality of broadcast programs broadcasted from a broadcasting apparatus (11), a matched one of the broadcast programs that matches the type information stored in a favorite storage unit (13) and the location information of one of a start point, transit points, and a destination point stored in a route storage unit (14). The matched broadcast program is stored in a broadcast program storage unit (16). A reproduction program selector (20) selects, as a selected broadcast program, the matched broadcast program stored in the broadcast program storage device if the matched broadcast program matches a current time instant held in a current time instant storage unit (17) and a current location held in a current location storage unit (18). The selected broadcast program is reproduced by a reproducing unit (19).

Abstract: When a transmission-line driver circuit that transmits a signal to a transmission line is supplied with a power-supply voltage from a power-supply circuit, the value of the power-supply voltage is controlled based upon the amplitude of a signal output from the transmission-line driver circuit. For example, the maximum value of a signal input to the transmission-line driver circuit in time units delimited at fixed time periods is detected, the target value of power-supply voltage supplied to the transmission-line driver circuit is decided based upon the maximum value, and the power-supply circuit is controlled in such a manner that the target value of power-supply voltage and actual value of power-supply voltage will agree.

Abstract: A method and apparatus for accessing a telecommunications system. A channel having a plurality of data rates and a plurality of frame sizes is utilized by a mobile station to gain access to the system. If channel conditions allow, a faster data rate of the available data rates and a smaller frame size of the available frame sizes may be used to request access over the channel. By dynamically determining the data rate based on channel conditions, overall access delays for mobile stations using packet data services and making many access attempts may be reduced.

Abstract: A radio communication apparatus including at the transmitter-side output stage a high-frequency power amplifier module that has incorporated therein a single-stage amplifier using one multi-finger type heterojunction bipolar transistor (HBT) or a multi-stage amplifier using a plurality of HBTs sequentially connected in cascade, and at the output end an antenna connected to the high-frequency power amplifier module, wherein first capacitors and first resistors are inserted in series between the input terminal of the high-frequency power amplifier module and the control fingers of the HBT, and second resistors are inserted between the control terminal of the high-frequency power amplifier module and the control fingers of the HBT and connected to the nodes of the first resistors and the first capacitors.

Abstract: A communication device locates a wireless service provider in a multi-service provider environment using a frequency band search schedule. The frequency band search schedule has a first or home band and a several other frequency bands in a predetermined order. The order of the frequency bands may be programmed by the user or by a home service provider over the air. The communication device searches for an acceptable service provider by examining the home band and then the other bands listed in the frequency band search schedule. The bands are examined in the order specified by the frequency band search schedule. An acceptable service provider is identified by comparing the identity of a service provider specified by an identifier received from a band being examined with a list of acceptable service providers.

Abstract: The present invention relates to methods for performing uplink scheduling of packet data when using adaptive antennas. In the solution according to the invention the uplink scheduling information is transmitted in an antenna beam towards the mobile for which the scheduling information is intended and by allocating mobile stations with similar position to the same packet data channel. All other data packets are transmitted in an antenna beam towards the mobile station for which the data are intended. By adopting the proposed solution it is possible to efficiently use adaptive antennas in a system carrying e.g. GPRS/EGPRS traffic. The carrier to interference gain introduced by adaptive antennas produces a pronounced increase in system performance.

Abstract: In order to avoid mechanical assembly problems and transmission of undesired electrical currents among circuit cards or boards in a telecommunications switch or similar digital device, a conventional hard-wired midplane bus is replaced by a wireless bus. The wireless bus includes a radio frequency or light wave transceiver on each card. Antennas on respective cards can either be oriented within direct line-of-sight of each other, or can project into a waveguide which directs the transmitted signals past all the other antennas. For example, the waveguide may be a metal enclosure which surrounds all the cards. Alternatively, respective aligned apertures in the cards can define a continuous transmission path. A data rate exceeding 1 megabit per second and a transmission power on the order of 1 milliWatt are preferred, since the bus is intended for use within a single switch housing.

Abstract: A multi-channel mobile satellite communication system for normal operation within spotbeams and during emergency operation, beyond the normal limit of a spotbeam. The system involves terminating non-emergency calls, then increasing the transmission power on the one channel to carry the emergency call, to a level above the normally acceptable transmission power levels, thereby permitting an extended range for emergency calls.

Abstract: A space efficient and cost effective hinge clutch mechanism for facilitating the rotational positioning of a lid member of a portable electronic device relative to the housing the device. The clutch mechanism includes an elongated cam-shaft extending through a plurality of aligned components including a face cam member, a cam follower, and a compression spring and partially through a hollow retaining member. Rotation of the retaining member prevents the cam-shaft from being inadvertently with drawn. The clutch mechanism may be manually or automatically pre-assembled before insertion into the housing. An idler positioned adjacent to the retaining member serves as conduit for wires extending from the rotating lid member and the housing of the portable electronic device. The interaction of the cam and cam follower retains the lid in its fully open or fully closed positions until sufficient rotational force is exerted on the lid to overcome the tangential force of the spring.

Abstract: A system for accessing broadcast SMS messages over a wireless communication system. A base station transmits SMS messages periodically and aperiodically over a broadcast channel. The base station allocates periodic slots in the broadcast channel for each of the subscriber services providing the SMS messages and transmits slot parameters to mobile units. Using the slot parameter information, the mobile units periodically wake up to scan the broadcast channel. The period for each category of broadcast SMS messages may be different and the period may apply to a single broadcast channel. Messages arriving aperiodically can be queued and transmitted in pre-scheduled broadcast channel frames. Messages with inter-arrival interval greater than the specified transmission period are simply repeated.

Abstract: A portable wireless communication terminal includes electronics for receiving and transmitting both video and audio signals. The electronics are housed in rugged, drop-tolerant consoles, which are interconnected so that they may be extended and reconfigured relative to each other for convenient use and easy, compact storage. A camera lens is included in a camera console, a video display is included in a video display console, and alphanumerical keys are included in a base console. The camera console can be rotated relative to the video display console so that the user can transmit a video signal of the surroundings while watching the video display. Further, the video display console can be extended and tilted relative to the base console.

Abstract: A function-oriented manufacturing approach in RF front-end architecture for use in a multi-band mobile phone. Electronic components in a front-end module, such as low-noise amplifiers that require the demanding silicon bipolar process, are fabricated separately from those components in an RF-ASIC that require the less demanding, yet more costly, Bi-CMOS process. When the transmission frequency band and the receiving band overlap, separate receiving antenna and transmitting antenna are used, instead of an antenna switch module with a duplexer, connected to separate bandpass filters for band selection. Differential Rx antennas are used so that the whole Rx-chain can be made differential. Furthermore, different impedances for Tx out and Rx in can be realized.

Abstract: A digital recorder system for use with cellular telephones includes a housing that defines a cavity into which a cellular telephone may be received. During cellular telephone use, a microphone disposed on the housing records sounds, and a speak disposed within the housing plays back sound. A digital recorder within the housing automatically records the past twenty-seconds of conversation. A user may press a control button on the housing to retain up to four such twenty-second segments, and may press another control button on the housing to record sound prospectively. An LED on the housing confirms operational mode of the system.

Abstract: A power distributing and synthesizing device which comprises first to third signal terminals, first and second transmission lines and a resistor. The first signal terminal is provided at the connection portion between one end of the first transmission line and one end of the second transmission line; the second signal terminal is provided at the other end of the first transmission line; and the third signal terminal is provided at the other end of the second transmission line. The resistor is connected between the second signal terminal and the third signal terminal. LC serial resonators each comprising an inductor and a capacitor are respectively connected between the first to third signal terminals and a ground.

Abstract: A mobile station can be used in both public cellular systems and private cellular systems, the private cellular system using select allocated frequency bands from the public cellular systems. There is disclosed herein a system for manually searching for one of the private cellular systems. The system comprises a memory storing information on select frequency bands. A transmitter and receiver is provided for communicating in the public cellular systems and the private cellular systems. An input initiates a manual search for one of the private cellular systems using the stored information on one of the select frequency bands. A programmed processor is operatively coupled to the memory, the transmitter and receiver and the input for operating the transmitter and receiver to search for the one private cellular system using the one of the select frequency bands.

Abstract: In a linear amplification system, an input signal is amplified to produce a substantially linear amplified output signal without causing significant intermodulation distortion or spectral growth. An envelope detector determines an envelope detector voltage from the input signal. A tracking power supply determines a supply voltage based on the envelope detector voltage. An input signal conditioner determines, in response to the supply voltage, a corresponding phase adjustment and a corresponding gain adjustment and modifies the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal. A power amplifier operates using the supply voltage and amplifies the conditioned input signal to produce the amplified output signal.

Abstract: In a cellular communication system, a processing arrangement and method supporting packet data communication. The processing arrangement includes a plurality of base station processors (BPs) and a plurality of managing processors (MPs). Each BP communicates with a plurality of base stations and mobile subscriber stations. The MPs manage the mobile subscriber stations, and each MP contains mobile subscriber station information for a number of mobile subscriber stations. The MPs provide information regarding their processing load status to the BPs by adding the information to packet data transmissions. The BPs use the information to assign each mobile subscriber station that is registered with the arrangement to one of the MPs.