Abstract: In a third generation telecommunications network, quality of service can be provided to a mobile in a foreign network by providing a quality of service session divided into a first section from the correspondent node (24) to the home network (50) and a second section from the home network (50) to the mobile node (28); a quality of service enquiry message is sent through both sections, but a quality of service response message is not returned in the first section until the response message from the second section has been received by the home network (50).

Abstract: The instant invention discloses a method and system for providing a novel wireless centrex service that untethers subscribers from the immobility associated with traditional desktop telephones. Essentially, the present invention extends the benefits of wireless voice and data services to subscribers having a need to move within a plurality of localities such as business and hospital campuses. In accordance with the invention, a wireless telephone subscriber can use a standard cellular/PCS telephone as a wireless extension of their desktop phone, while in the proximity of a miniature radio base station capable of communicating with the PCS/cellular telephone. The advantage of such a system is that a subscriber can use the same cellular/PCS telephone that provides service in the public network in the wireless centrex environment. Additionally, the wireless centrex system provides services and features which are similar to those offered to regular centrex telephone subscribers.

Abstract: Disclosed is an apparatus for controlling the SMS of a digital mobile station, which enables both the sender and receiver to exchange short messages in a duplex mode. The apparatus comprises a display with a message screen capable of dividing the message screen into at least two display regions, a distinction message detector for detecting a predefined distinction message contained in a received message, and a control unit for causing the received message to be displayed on a selected one of the at least two display regions if the distinction message is detected.

Abstract: The present invention is directed toward the transmission subsystem of a multi-mode, multi-band communication system that can transmit and/or receive one or more information signals on one or more transmission frequencies using one or more modulation schemes. According to embodiments of the invention, the up-conversion section is implemented using a universal frequency translator (UFT).

Abstract: An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenna. By optimally combining the signals that are received by each independent finger of the rake receiver, interference that is correlated between a finger associated with the first antenna and a finger associated with the second antenna can be minimized with respect to the desired signal. Optimum combining requires determination of optimum combining coefficients. A max-ratio combining algorithm may be substituted for the optimal combining algorithm depending upon interference characteristics.

Abstract: In a cellular communication network (20) having a channel assignment plan (28) that distinguishes frequency channels (34) assigned to a plurality of cells (24), a method (58) and system (46) adapt the channel assignment plan (28) during network planning to include shared frequency channels (45). Borrower cells (84) are identified in response to a deficiency value (36) indicating a shortage in a quantity of the frequency channels (34) assigned to the borrower cells (84). Donor cells (95) are selected from the cells (24) in response to a load factor (38) for each of the cells (24), the load factor (38) indicating the number of frequency channels (34) already being shared by the cell (24). Candidate frequency channels (34) that may be shared are evaluated against predetermined channel sharing constraints, such as frequency separation constraints (156, 158), co-channel carrier-to-interference C/I constraints (232, and adjacent channel C/I) constraints (280).

Abstract: A radio communication apparatus is provided which is capable of automatically selecting a suitable radio communication device at the time of activating a communication application such as an electronic mail or a file transfer. This radio communication apparatus comprises a first table for predefining an important judgement parameter out of a plurality of judgement parameters corresponding to a plurality of communication applications, a second table for pre-setting data corresponding to a plurality of judgement parameters corresponding to a plurality of radio communication devices, and control devices for selecting a radio communication device by referring to the second table based on an important judgement parameter acquired by the second table based on an important judgement parameter acquired by referring to the first table in response to activation of a communication application.

Abstract: A communications device includes an amplifier module configured to amplify a signal. The amplifier module includes a parallel arrangement of amplifiers each designed to operate with increased efficiency for different power level ranges. A controllable switch selectively interconnects the power amplifiers. A controller in communication with the controllable switch selectively interconnects the power amplifiers to increase the efficiency of the amplifier module.

Abstract: A method and apparatus for home location register fault recovery in a system which uses a gateway location register to reduce signaling between visitor location registers and home location registers. When a home location register is recovering from a fault, the home location register sends a reset message to the gateway location registers which are serving mobile subscribers associated with the home location register. The gateway location register sends a reset message to visitor location registers which are serving mobile subscribers associated with the home location register. The gateway location register can determine which mobile subscribers are associated with the home location register by comparing mobile subscriber identification information stored in the gateway location register with information contained in the reset message from the home location register.

Abstract: A direct conversion receiver for receiving a first input signal and directly downconverting it to baseband frequencies. The receiver includes a frequency translator which is responsive to a phase-split input signal having 2n components, wherein n is an integer greater than 1. The phase-split signal has a period T which is about n times the period of the first input. The frequency translator alternates, at a rate of about 2n/T, between switching the first input signal to a first output, and switching the first signal to a second output. A preprocessor is available to improve the switching characteristics of the phase-split input signal.

Abstract: Logical coverage areas are dynamically rearranged to meet the traffic needs of a wireless switching system. Further, the logical coverage areas do not have to be initially provisioned during deployment of the wireless switching system since the initial determination of the logical coverage areas is automatically performed. Once the logical coverage areas are established, the logical coverage areas adapt to the changing needs of the community of wireless handsets. A first embodiment allows the base stations to control the rearrangements, and a second embodiment allows a system wireless controller controlling the wireless switching system to control the rearrangements.

Abstract: An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenna. By optimally combining the signals that are received by each independent finger of the rake receiver, interference that is correlated between a finger associated with the first antenna and a finger associated with the second antenna can be minimized with respect to the desired signal. Optimum combining requires determination of optimum combining coefficients. A max-ratio combining algorithm may be substituted for the optimal combining algorithm depending upon interference characteristics.

Abstract: A system and method for quality-driven channel selection in a communication network that measures interference on idle and active voice channels in a first quality-driven channel selection (QCS) cell is disclosed. A voice channel queue is automatically ordered based on a clearest voice channel which is determined by a reverse bit error rate (RBER) measurement and a forward bit error rate (FBER) measurement on the active voice channels and by an idle noise measurement on the idle voice channels. Further, dynamic channel sets (DCS) are created from the voice channel queue based on the RBER, FBER, and idle noise received, where the DCS are queues that include low interference channels and moderate interference channels.

Abstract: In a method for channel assignment according to the invention, a TDD transmission method with timeslots as channels is used for radio transmission between a base station and mobile stations, with a switching point separating timeslots for a up link direction and timeslots for a down link direction. A transmission parameter relating to a transmission quality is in each case defined for the radio transmission between the base station and a plurality of mobile stations. The mobile stations with the qualitatively better transmission parameter are preferably assigned timeslots close to the switching point.

Abstract: Data delivery in GSM and UMTS co-existing networks is controlled by apparatus located within the network infrastructure which predicts the trajectory of a moving mobile station (26) requesting transmission or reception of data. By knowing the trajectory of the mobile station (26), the transmission can be made in an optimum manner by setting an appropriate transmission rate or delaying transmission until the mobile station (26) reaches a cell (18) able to accommodate faster data rates than its neighbours (17, 19). The trajectory prediction is based on a learning process whereby a large population of mobile stations' behaviour in a designated zone (5) is monitored over a period of time. Mobile stations with like behaviourial characteristics are grouped together. A mobile station (26) requesting a service for data transmission is matched to one of the recorded groups from which its trajectory can be predicted.

Abstract: A portable radio information terminal with a message-notification mode/message-storage mode setting unit, a message-notifying-device-operation control unit and a display-mark turning-on/off unit. The message-notification mode/message-storage mode setting unit sets the portable radio information terminal in a message-notification mode for notifying the user of a message in the event of an incoming information signal conveying the message or in a message-storage mode for halting an operation to notify the user of a message in the event of an incoming information signal conveying the message. The message-notifying-device-operation control unit enables a selected message-notifying device to notify the user of an incoming information signal in the message-notification mode or prevents a selected message-notifying device from notifying the user of an incoming information signal in the message-storage mode.

Abstract: The present invention relates to a tuning circuit, more specifically to a tuning circuit for continuous-time filter capable of making exact the Gm value to minimize the variation of the cutoff frequency due to the variation of process in the Gm-C type of continuous-time filter.

Abstract: A direct conversion receiver comprising a preprocessor coupled to a frequency translator which, in one implementation, is a modified Gilbert mixer. In one embodiment, the preprocessor imparts desired characteristics to split-phase signals received from a local oscillator, including transition points which are determined by crossings through a DC offset, substantial symmetry about a DC offset, and steep transitions about the transition points. In one embodiment, the period of the signals from the local oscillator is divided into portions, and only one of the output signals from the preprocessor is asserted in a predefined state at a time, the predefined state determined effective to reverse polarity of the mixer, signals and a related frequency translator which is responsive to the signals. The frequency translator has a first input at a first input frequency, and at least one second input at a second frequency.

Abstract: A computer cellular communication system is provided including a computer having a communication jack adapted for being releasably connected to a hard line communication network and a motherboard mounted within the computer. The motherboard has mounted thereon read only memory, random access memory, and a central processing unit connected to the read only memory and the random access memory. Also included is a cellular communication module mounted directly on the motherboard and including a cellular transmitter for transmitting data in free space and a cellular receiver connected to the first communication jack of the portable computer for receiving data in free space. The cellular communication module further includes a first modem connected to the cellular transmitter and the cellular receiver for communicating data therewith. The first modem generates a receive signal upon the receipt of a call signal via free space having a predetermined associated cellular telephone number.

Abstract: An electromagnetic radiation protection device of a mobile phone installed at one side of an antenna of a mobile phone. The device comprises an electromagnetic wave absorbing piece, a dielectric plate, an electronic joint loop, a negative electrode lead, etc. The electromagnetic wave absorbing piece serves to absorb the electromagnetic wave toward the user's head. Then the electromagnetic wave irradiates to the negative electrode lead of a power source through the electronic joint loop and the negative electrode lead. Thereby, the electromagnetic radiation from the mobile phone to user's head will be reduced effectively, and the threat of brain harm is also reduced.