Abstract: The invention provides an up/down converter with low phase noise. Signals from a first local oscillator are fed through a power splitter to first and second mixers. Signals from a second local oscillator and signals from the power splitter are mixed by the second mixer. The frequency component of the difference between the two signals is removed by a first bandpass filter and passed to a third mixer. Input signals are mixed with signals from the power splitter by the first mixer, and the lower frequency component of the output signals from the first mixer is removed by a second bandpass filter and is passed to the third mixer. Signals from the first and second bandpass filters are mixed by the third mixer. The higher frequency component of the output signals is removed by a low pass filter and is output.

Abstract: An exciter system (1, 2) able to communicate information between an exciter unit (10) and one or more remote units (12) or between multiple exciter units (10). The exciter units (10) may include wireless type exciter devices, such as optimum exciters (14), or they may include wired equivalent type exciter devices, such as direct connect exciters (16). The exciter devices (14, 16) inject or extract RF currents (24) in the metallic framework (22) of a vehicle. The remote units (12) couple electromagnetic fields (26) with the metallic framework (22) of the vehicle. The information is exchanged with the exciter devices (14, 16) by communications equipment (20) that modulates or demodulates the RF currents (24) and/or electromagnetic fields (26) with the information. As the RF currents (24) and/or electromagnetic fields (26) reach everywhere within, on and in close proximity to the vehicle the information is communicated throughout.

Abstract: A deadlocked resource condition in a pool of shared resources is detected by measuring a characteristic of resource utilization over a predefined time interval and comparing the measured characteristic in accordance with a predicted statistical relationship. If the measured resource utilization is inconsistent with the predicted statistical relationship, a deadlocked resource condition is determined to have occurred.

Abstract: A Medium Access Control protocol software architecture which comprises a microcode component providing the protocol implementation level functions and an engine component providing hardware level functions. The Medium Access Control protocol and method for use in a network system allows for centralized management of all MAC-level services by a master device. The Medium Access Control protocol provides an improved protocol message throughput via the sequence retransmission request protocol scheme. The Medium Access Control protocol provides a reduced data transmission latency and provides dynamic allocation of data slots within a Time Division Multiple Access frame definition. The Medium Access Control protocol also provides a set of failure management functions and power control support.

Abstract: A method for performing the network direct system selection (NDSS) of a mobile station (MS) in a cellular communications system that includes the steps of: making a base station (BS) to include a dialed phone number designated for the NDSS in a CM SERVICE REQUEST message being transferred from the MS to a first MSC; making the first MSC to transmit a NDSS FEATURE REQUEST INVOKE message of the MS to the HLR upon confirming that the dialed phone number corresponds to the NDSS; making the first MSC to transmit a FEATURE REQUEST INVOKE CONFIRMATION message to the MS via the BS; making the HLR to transmit a QUALIFICATION DIRECTIVE message containing a service re-direction information to a first VLR coupled to the first MSC when the FEATURE REQUEST INVOKE message is accepted by the HLR; making the first VLR to confirm whether the QUALIFICATION DIRECTIVE message includes the service re-direction information; making the first VLR to transmit a SERVICE RE-DIRECTION message, consisting of the service re-direction infor

Abstract: A device such as a radiotelephone having a housing within which is located a single printed circuit board and a headset socket 30 including a body and spring contacts 38 which are held in operative contact with the circuit board by retaining means comprising co-operating parts 22, 23, 44 of the housing and the body of the socket.

Abstract: A method for allocating a plurality of spreading codes to a plurality of base stations is disclosed. After retrievably storing distances between each of the base stations and other base stations in a memory, the memory is searched for a longest distance of the distances. Based on a necessary spreading code difference and a longest spreading code shift corresponding to the longest distance, a spreading code spacing between spreading codes to be allocated to the base stations is determined. Then, spreading codes with the spreading code spacing are sequentially allocated to the base stations.

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: An apparatus and method for controlling the timing of control bursts in a wireless communications network maps the timing of control bursts on a multiframe by multiframe basis. In one implementation, a method of controlling base station transmissions in a wireless network in accordance with a multi-frame timing structure is provided. The method is defined as a succession of y frames, each frame including a succession of x time-slots, and includes allocating a frame/time-slot number pair to set the timing of a first-type control burst for a first multi-frame, and changing at least one of the (i) frame number and (ii) frame number and time-slot number of the frame/time-slot number pair for a second multi-frame so that the timing of the first-type control burst is different during the second multi-frame relative to the first multi-frame.

Abstract: A method for allocating a data transmission channel/sub-channel in a telecommunication network. A network includes a telecommunication controller (BTS) and several terminal equipments (MS). The transmission channel is divided into one or more time slots, each of which comprises one or more sub-channels. One or more time slots or sub-channels can be used as a control channel that is further divided into one or more control sub-channels. The terminal equipments (MS) send data in data packets at least on one sub-channel. The telecommunication controller (BTS) sends to the terminal equipments (MS) information about control sub-channels and their allocation situation. Different priorities (P1 to P4) are assigned to the data packets to be sent and to be control sub-channels and their allocation priority of the data packet to be sent and the priority of the control sub-channels, each terminal equipment (MS) determines the moments when it may send a channel request.

Abstract: A priority access channel assignment system and a messaging protocol allow wireless mobile stations to place calls having differing priority levels. A mobile station originates a call, which may automatically include a request for priority access or may require manual intervention by the user to request priority access. If system resources are unavailable to process the call immediately, the origination message is processed by a base station and a mobile switching center using a plurality of messaging protocols to determine the time at which the call was originated and a priority level associated with the call. Based on the priority level and arrival time, the base station places the call in an appropriate position within a queue. Higher priority calls are placed in a higher position in the queue than lower priority calls. Calls having identical priority are placed in the queue in order of the time of arrival.

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: This invention relates to a dating service which allows potential dates to observe the users of the system in their automobiles. The preview of the person allows them to decide if they are compatible in age, attractiveness, and economic level. The potential date could then call a telephone service to hear a brief message about the person's interests and information, after entering in the automobile's license plate number. A voice message can then be left for the user of the system for anonymous contact.

Abstract: A method and system for generating one of a first and second audible tone in a telephony system including a telephony device responsive to a first signal to generate the first audible tone and responsive to a second signal to generate the second audible tone includes receiving an information signal from the telephony system and a user initiated signal from the telephony device indicating a desire to initiate a call from the telephony device. A processor processes the information signal and the user initiated signal to determine at least one of billing rate information, available services, and service control procedures associated with the desired call and generate one of the first and second signals. A dial tone generator generates one of the first and second audible tones in response to one of the first and second signals, respectively.

Abstract: The present invention comprises a docking system for connecting a portable communication device to a further signal transmission line. The docking system may be arranged within a workstation such as a desk or a tray. The system may also envelope a room in a building or be located in a vehicle, to control and restrict the radiative emission from the communication device and to direct such radiation to a further remote antenna and or signal distribution system connected to the transmission line.

Abstract: A method and apparatus for providing an antenna condition signal and a feeder cable condition signal in a base station having an antenna coupled to a cabinet by an antenna feeder cable. Two directional couplers are configured to detect forward and reflected signals to and from the antenna. Power detectors are coupled to the RF couplers, and are configured to provide forward and reflected power signals. A first differential amplifier provides a detector tuning signal proportional to the difference between the forward and reflected power signals. A second differential amplifier provides a detector tuning signal proportional to the difference between the forward and a reference voltage. Each differential amplifier tunes a voltage controlled oscillator (VCO). The output of the VCOs is coupled to the feeder cable. A phase locked loop at the cabinet is coupled to the feeder cable and provides a recovery tuning signal which tracks the tuning signals to the differential amplifiers.

Abstract: A wireless communication system (40). The system comprises transmitter circuitry (42) comprising encoder circuitry (44) for receiving a plurality of symbols (Si). The system further comprises a plurality of antennas (AT1-AT4) coupled to the transmitter circuitry and for transmitting signals from the transmitter circuitry to a receiver (UST), wherein the signals are responsive to the plurality of symbols. Further, the encoder circuitry is for applying open loop diversity and closed loop diversity to the plurality of symbols to form the signals.

Abstract: A reception device is disclosed for a radio communication system for the reception of subscriber signals via a radio interface. The reception device contains a means for determining number of active subscribers from the a total number of subscribers that are assigned to the radio interface, and contains a further detection device for detecting at least one subscriber signal. As a result of the determination of the subscribers actually active from the subscriber signals, a detection is simplified particularly when the subscriber signals are separated by a fine structure.

Abstract: A cellular radio system forms a non-homogeneous channel set and utilizes a dynamic channel assignment in a cellular radio system. This combination increases the number of candidate channels with essentially the same level of interference that is experienced with respect to utilizing a homogeneous channel set with a dynamic channel set. The resulting improvement increases the call capacity of a cellular radio system without requiring additional frequency spectrum. Hence, more cellular radio subscribers can be served simultaneously.

Abstract: A new process for determining the administrator of a mobile communications device, e.g., a wireless cellular telephone, two-way pager, or laptop computer, connectable to a telecommunications network. The system and methods described provide processes for determining whether a Subscriber Entity Module (SIM) is present with a digital certificate for a domain of an administrator, e.g., a network operator, for designating administrative responsibilities in a mobile communications device. A mechanism is provided to designate administrative privileges to an entity by the owner of the mobile communications device.