Abstract: A system, apparatus and corresponding method for time synchronization, using cellular signal bursts, of for example a global positioning system (GPS) receiver.

Abstract: A wireless telecommunications system uses location or position information of a wireless mobile unit to initiate the sending of location-specific information to travelers. As position information is received, it is compared to prestored position information of a remote location, such as an airport. As the traveler approaches the remote location, and gets within a certain distance the remote location, information such as airline arrival information is retrieved and sent to the wireless mobile unit of the traveler. Thus, useful information tied to the position of the wireless mobile unit, such as airline or traffic information for example, is obtained.

Abstract: A portable telephone is provided, which eliminates or effectively suppresses the change of the antenna impedance due to approach or contact of a human body with the telephone. The telephone operates without using sensing detection devices for recognizing the actual approach or contact of a human body with the phone. The device insures the desired antenna characteristics with a simple and low-cost configuration. Different impedance values of an impedance matching subsystem are switched so as to be interlocked with a start and stop of a talking state of the portable telephone.

Abstract: Methods and devices for modifying operational modes in a communication device based on application specific parameters. The operational modes of the communication device are modified by adding the application specific parameters of the application to the operational modes of the communication device. Further, commands may be automatically launched after an operational mode change in a communication device. One or more commands to be automatically launched when an operational mode becomes a current operational mode currently used by the communication device are entered into the operational mode of a communication device of a user. Whether the current operational mode has any commands to be automatically launched is determined. The one or more commands are automatically launched if the current operational mode has any commands to be automatically launched.

Abstract: A connection control system for a mobile communication network comprising means for (a) classifying services of base stations according to service levels and (b) for storing, in each of the base stations, identification information corresponding to one or a plurality of providable service levels in a memory part, and (c) for comparing a service level requested by a mobile station with the one or plurality of providable service levels based on the identification information stored in the memory part. Then selecting, in each base station, a service to be provided on the basis of the comparison described in step (c), so that services of service levels independently established for every area can be provided to the mobile stations each registered in a respective one of the base stations.

Abstract: A method of allocating time slots in a time division multiple access cellular telephone system increases the traffic capacity of a base station's RF channel. A method is provided for operating in half rate mode while maintaining adequate signal quality over the RF channel communications link between a base station and a mobile station. In full rate mode, each mobile station is allocated at least four of the twelve slots. For mobile stations experiencing little or no signal deterioration from other sources, a channel can be operated in half rate mode with little or no adverse effect to the signal quality. For mobile stations that are experiencing signal deterioration, the same channel can provide full rate mode support.

Abstract: A keyless entry system includes a controller that operates in one of two modes. When an authentication signal is received from a passive signaling device, the controller operates in one mode that permits more convenient access to a user. When an authentication signal is not received from the passive signaling device, the controller requires another mode of operation from a manually operable signaling device. In one example, the manually operable signaling device is a numeric keypad. When an authentication signal from the passive signaling device is received, any single key can be manipulated to gain the desired access controlled by the system. When no authentication signal is present from the passive signaling device, then the controller preferably requires a specific sequence of key activation before access is permitted.

Abstract: There are provided an apparatus and method for transmitting/receiving a long message by SMS (Short Message Service) in a digital portable terminal. Upon request of the SMS message transmission, a message inputted by a user is read. The read message is divided into a plurality of shorter messages with a predetermined length if the read message exceeds the maximum allowable SMS message. A header having a long message ID and divided message sequence information are generated for each divided message. The short divided messages are generated by assembling each divided message with a header and transmitting successively in an appropriate order. Upon receipt of the successive short messages, a predetermined unique long message ID is detected from the header of each short message, and the message sequence information is read from the header if the long message ID is detected from the header.

Abstract: The invention concerns a radio communication device comprising a base station installed on a vehicle and at least a mobile station in the possession of a residence subscriber located on a site, and said radio communication device is operated by detecting in the base station when the vehicle reaches a site available time windows then by transmitting into these time windows a signal representing the vehicle identity.

Abstract: A method is disclosed to distinguish a first type of control channel from a second type of control channel. The method includes steps of (a) transmitting a carrier of the first type of control channel so as to include a first symbol sequence that results, when demodulated, in a sine wave having a frequency with a first offset from the carrier; (b) transmitting a carrier of the second type of control channel so as to include a second symbol sequence that results, when demodulated, in a sine wave having a frequency with a second offset from the carrier; and (c) demodulating a received carrier and detecting whether the carrier includes the first type of control channel of the second type of control channel. In the preferred embodiment of this invention the first symbol sequence is an all zeroes sequence, and the second type of symbol sequence is an alternating ones and zeroes sequence, which results in the first offset being a positive offset, and the second offset being a negative offset.

Abstract: Synchronization is effected in a cellular telecommunications network between a timing unit located at control node (e.g., RNC) of the network and a slave timing unit (STU) located at a controlled node (e.g., base station) of the network. Upon determining that a synchronization adjustment of the slave timing unit is necessary, an adjustment signal (e.g., voltage signal) is caused to be input to the oscillator of the slave timing unit in order to change the frequency of the slave's oscillator. Frame counter(s), in communication with the oscillator at the slave timing unit, will thus follow the oscillator continuously with smooth phase adjustments. By avoiding a direct adjustment of the frame counter(s), undesirable phase jumps or steps are avoided that can potentially disturb the air-interface between a base station and mobile station (MS).

Abstract: A network system capable of changing the billing rate for a telecommunication service includes Service Switching Point (SSP) (7) and a Service Control Point (SCP) (9). The SSP (7) implements call management by performing switching functions for placing a call, and implements service selection functions by detecting service indicators associated with the call. The SSP (7) also activates interactions with the SCP (9), which contains logic programs used for providing the indicated service. Signaling System 7 (SS7) of the Common-Channel Interoffice Signaling (CCIS) system is used for digital signaling between the SCP (9) and the SSP (7). When a user initiates a call, the SSP (7) acquires user data and trigger information from a Service Data Base (SDB) (11) associated with the SCP (9). During the call, when the SSP (7) detects that a trigger corresponding to the trigger information has been activated, the SSP (7) subsequently activates a SCP whose address the activated trigger gives.

Abstract: The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other shared interference, where the one or more radio signals can be separated from the first radio signal.

Abstract: A satellite receiver is switchable between an operating mode wherein the receiver is capable of generating an output signal using received signals from one or a plurality of satellites, aid another operating mode wherein the receiver generates an output signal using signals received from only one satellite. The former operating mode is useful when the receiver is operating in a mobile environment. The latter operating mode is useful when the receiver is operating in a fixed environment. The receiver is configured to detect the mode in which it is operating. The receiver comprises at least two recevier arms for processing a broadcast signal from a selected one of two satellites. The receiver disables one of the arms when the receiver is stationary.

Abstract: In one embodiment according to the invention, a digital cordless telephone includes a base unit adapted to couple to a telephone network, to transmit an outgoing message to an incoming caller, to store a digital message from the incoming caller, and to transmit and receive digital samples over an RF link. The digital cordless telephone of this embodiment also includes a handset adapted to transmit and receive digital samples over the RF link. According to this embodiment, the base unit and handset are further adapted to enable a user to monitor the stored digital message from the handset.

Abstract: A TDMA system (11) is provided using a programmable, fixed-period frame structure for communication between network terminals (6,10). All bursts are timed with respect to this programmable periodic frame. Each terminal (6,10) uses its local clock to generate a transmit frame period and a receive frame period. According to the invention an Acquisition and Synchronization procedure is provided to align the start of transmit frame period and start of receive frame period and start of receive frame period at each terminal in such a way that if a burst is transmitted by any terminal at offset x after local start of transmit frame period, then all terminals receive that burst a position y after their local start of receive frame periods, where Ýy−xÝ is less than a small threshold value. In addition, a number of different types of bursts are used for communication between terminals. The various types of bursts are programmable.

Abstract: A fraud detection system receives data relating to telecommunications activity. Event generators generate events from the received data, with each event having a weight corresponding to an increased or decreased likelihood of fraud. The aggregated events for a subject (a subscriber or an account) determine a score for the subject, which is used to prioritize the subject in an investigation queue. Human analysts are assigned to open investigations on the investigation queue according to the priority of subjects. In this manner, investigation resources can be applied more effectively to high-risk subscribers and events.

Abstract: Overload distortion protection for a wideband receiver having a wideband variable gain input amplifier followed by a frequency conversion stage followed in turn by an intermediate frequency amplifier and detector to produce a measurement value in response to a signal input to the wideband variable gain input amplifier is achieved by detecting the peak power of the signal at the output of the wideband variable gain input amplifier and comparing it with the power output from the intermediate frequency amplifier and detector. If a threshold difference is exceeded, gain control signals for the wideband variable gain input and intermediate frequency amplifiers are adjusted for optimum dynamic range. If there is no range for adjusting the gain control signals, then a warning is provided to an operator to alert that the measurement value may contain distortion.

Abstract: A methodology is provided for processing carriers in a wireless application whereby the outputs of a multiplicity of modulated RF signal sources are combined into a single RF signal stream, that single RF signal stream being thereafter divided among the inputs of another multiplicity of RF power amplifiers. The outputs of that multiplicity of RF power amplifiers are then recombined, filtered and provided as an input to a transmission antenna.

Abstract: A method and system for simultaneously sharing wireless communications among multiple wireless handsets deployed in a wireless network having at least one cell site associated therewith includes a first and second wireless handset for transmitting a request for the same wireless communication. The wireless network then assigns a first wireless receive channel to the first wireless handset and the second wireless handset and simultaneously transmits the requested wireless communication to the first and second wireless handsets for receipt by the first wireless receive channel. If the requested wireless communication originates from a source handset, and the first and second handsets are located in direct communication proximity to the source handset, the source handset itself negotiates the common wireless receive channel for receiving the requested wireless communication.