Abstract: In particular, according to the present invention, information is selectively displayed on a graphical display of a radiotelephone by suppressing display of information entered into the radiotelephone from a keypad of the radiotelephone as the information is entered. The suppression may occur after the radiotelephone is placed in to a display-suppressed state. Display of the entered information may be suppressed by displaying information other than the entered information. For example, a single character may be repetitively displayed in response to a plurality of different keystrokes performed on the keypad, or a blank display may be provided in response to a plurality of different keystrokes performed on the keypad. According to other aspects, the state of the radiotelephone may be controlled manually or automatically. The radiotelephone may be placed in one of the display-suppressed state or a non-display-suppressed state by entering a predetermined command from the keypad.

Abstract: A location is determined (402) at which a subscriber unit (122, 300) communicating with a first wireless system is positioned. A distance between the location and a second wireless system preferred by the subscriber unit is calculated (404), and, based upon the distance, it is decided (408) whether the subscriber unit will scan for a signal from the second wireless system.

Abstract: A radiotelephone proximity detector, comprising a first proximity unit associated with a radiotelephone and a second proximity unit associated with a user wherein the second proximity unit includes a transmitter for transmitting a proximity signal, and the first proximity unit includes a receiver for receiving the proximity signal and an analysis unit for estimating the proximity of the first and second proximity units on the basis of the received proximity signal, the first proximity unit being operable when the estimated proximity of the first and second proximity units exceeds a threshold to cause the radiotelephone to change into an operating mode in which its normal use is prevented.

Abstract: A telecommunication device has a processor for processing data and a memory which stores the data. The memory is coupled to the processor by a data bus and an address bus. A first address counter provides an output address to the memory for reading out a desired data having the output address. A count of the first address counter is changed to a current address in response to a control signal from the processor, each time the processor generates a desired address. The current address is provided to the memory as the output address which is also the desired address. A comparator compares the desired address with the output address from a second address counter and outputs a load signal to the first counter when the current address from the second address counter differs from the desired address. The load signal loads the desired address in the first counter over the address bus when the current address differs from the desired address so that the output address is equal to the desired address.

Abstract: A demodulator and demodulating technique is provided which automatically switches modes according to the flat-fading or multipath channel status of an incoming signal. If an incoming signal has delay spread in addition to fading a standard Maximum Likelihood Sequence Estimator (MLSE) equalization is selected as an optimum demodulation mode. If the incoming signal is only flat-fading a symbol-based demodulation mode is selected. The Maximum Likelihood Sequence Estimator (MLSE) equalizer mode is thus integrated with the symbol based mode. Channel status is first identified in order to do mode selection in the demodulator. A dual-mode receiver for demodulating both flat-fading and multipath signals in a communications system (FIG. 1) comprises a Baseband Digital Signal (DSP) Processor further comprising a Channel Identification Processor, the Channel Identification Processor computing a Maximum Likelihood Sequence Estimate x=(x.sub.0 x.sub.1).sup.

Abstract: The present invention discloses a method for improving a call quality by increasing the output of a mobile station over the reverse link by adjusting threshold range of a system's predetermined E.sub.b /N.sub.o value in the event that the transmission output of the mobile station is stopped in a reverse power control of a cellular system, and by comparing the measured E.sub.b /N.sub.o ratio to a predetermined threshold E.sub.b /N.sub.o ratio to increase/decrease the mobile station transmit power. The method includes steps of adjusting the predetermined threshold E.sub.b /N.sub.o ratio by monitoring the call quality in a forward frame, and repeatedly increasing/decreasing the mobile station transmit power accordingly.

Abstract: An arrangement for accurately measuring the frequency of an RF signal is disclosed. The arrangement includes a coaxial delay line carrying the RF signal and a means for directly measuring the resistance of the coaxial delay line and which resistance measurement is directly correlatable to temperature changes of the coaxial delay line. The arrangement, in response to the changes in the temperature of the coaxial delay line, provides appropriate signals to compensate for the temperature changes in order to prevent any temperature changes from degrading the accuracy of the frequency measured by the arrangement.

Abstract: Method and apparatus for sharing a SIM card between two masters. The invention may be embodied in so-called multi-mode radiotelephones that use SIM cards to store and access information. The multi-mode radiotelephone includes at least two master components and a single SIM card. The method and apparatus synchronizes and coordinates communications from either master component directly to the SIM card, thereby allowing a single SIM card to directly service two master components.

Abstract: A subscriber to a remote call forwarding feature on a wire-line telephone line associated with a PBX (101) or central office (402) can enable that feature by dialing feature code from his cellular phone (103, 403). The subscriber dials a feature code from his cellular phone, which feature code is received by the cellular phone's Mobile Switching Center (MSC) (105, 405) and forwarded to a Service Control Point (SCP) (106, 406). The SCP recognizes the feature code as a request to invoke the remote call forwarding feature on the subscriber's wire-line telephone so that calls directed to that wire-line telephone are forwarded to the cellular phone. Receipt of that feature code by the SCP, together with the cellular phone's Electronic Serial Number (ESN) and Mobile Identification Number (MIN) identifies the subscriber and the feature to be invoked for that subscriber.

Abstract: A novel communications modular docking station receives information related to one or more types of services and forwards information to one or more subscriber destinations. The communications modular docking station includes a housing and a single coaxial line-in on the housing for receiving the service information from an optical node in communication with a central office and for receiving power from a power hub. The communication modular docking station is engageable with a module having a flange which can be slidably received in a slot on the communications modular docking station. The slot is at least partially defined by a wall which limits the distance the flange can be slid along the slot. The module is secured to the communications modular docking station by a securing member which is received in a bore on the wall of the communications modular docking station. Within the housing is a communicator, and on the housing is a line-out.

Abstract: In a hands-free speech communication apparatus incorporating an echo canceler in a mobile telephone, a howling prevention unit for preventing howling caused due to leakage of a mobile-side loudspeaker output voice into a mobile-side microphone input during hands-free speech communication and an echo canceler for canceling an echo generated due to leakage of a transmission voice signal from a self line output terminal into a reception voice signal input to a self line input terminal are constituted by a one-chip digital signal processor. The digital signal processor is controlled by a microprocessor incorporated in an external cellular phone, thereby controlling/processing operation parameters of the howling prevention unit and the echo canceler on the basis of software.

Abstract: A wireless base station equipment includes a transmission power controlling unit for controlling a transmission power of a transmitted signal to be transmitted to a mobile station in accordance with a status of signal reception from the mobile station and a beam tilt angle varying unit for varying a beam tilt angle of an antenna formed with respect to a horizontal plane, based on the level of transmission power control by said transmission power controlling unit.

Abstract: A communications system allocates communication bandwidth to calls in such a manner for optimizing network system performance. The system uses knowledge about the state of the past and present network demand, and network resources. Predictions of future demand and future network resources are used to calculate future network performance. Allocation decisions are chosen based on network performance calculations and probabilities of achieving future network states.

Abstract: A base station (214) synchronizes a data stream of a second transmitter (202) with that of a first transmitter while maintaining full user traffic through a radio communication system (200). The first and second transmitters transmit (501), during a first time interval, a first portion of the user traffic in a simulcast mode; and at least the first transmitter transmits (503), during a second time interval, a second portion of the user traffic in a non-simulcast mode. A receiver (204) proximate the second transmitter monitors (505) the second portion of the user traffic transmitted from the first transmitter to determine a time delay, and then adjusts (507) a launch time of the second transmitter in accordance with the time delay.

Abstract: A cellular telephone incorporating a structural frame member having a side wall and a web, where each of these structural elements are made up of different materials. Through selection of side wall and web materials, an overall frame structure having a significantly reduced web thickness, as compared to conventional cellular telephones, can be obtained. This reduction in web thickness ultimately translates to a reduction in overall phone unit thickness, thus allowing for the production of a smaller, more compact cellular telephone.

Abstract: A mobile radio network comprising a plurality of mobile radio stations and at least one mobile radio exchange for controlling communication within a mobile radio network, the subscribers being identified with respect to the mobile radio network by means of a chip card (Subscriber Identity Module--SIM) which is inserted into the mobile radio station. The mobile radio network incorporates a short message service which transmits to the subscriber chip cards (SIM cards) data in a predetermined short message format containing a standardized header. The short messages can be of two types: (a) a conventional short message whose data only contain information for the subscriber which is temporarily stored in the subscriber chip card (SIM card) and can be displayed on a mobile radio station display; and (b) a reconfiguration short message which can reconfigure the subscriber chip card (SIM card) in given data fields.

Abstract: A frequency plan revision proposal is evaluated to determine whether it is compatible with the current cell configuration by insuring that sufficient frequencies having appropriate operating modes are available for assignment to meet the traffic and control channel requirements and availability of the included cell transceivers. A record is kept of previously approved proposals resulting in a revision to the frequency plan assignment. A determination is then made as to whether the current proposal if implemented would have an adverse effect on the network in view of the previously approved proposals maintained by the record.

Abstract: A subscriber's PMU (Personal Messaging Unit) (14) determines when the number of incoming messages is likely to be excessive by counting the incoming messages and comparing their number and rate of receipt to stored thresholds. The subscriber is alerted when an excess is detected, and he is given options such as: routing future messages to himself via alternate and less expensive communication links (34,38), or terminating messages sent to one of his PMU's addresses that has been receiving messages at a high rate. Similar control can be effected at the PMU's base station (12).

Abstract: An integrated receiver in which in order to permit ac-coupling between stages and to remove the effects of strong directly detected amplitude modulated interfering signals lying within the input band of the receiver, the input signal is frequency down converted using a local oscillator signal which provides an intermediate frequency (F.sub.if) which lies above the frequency of the directly detected interferer (F.sub.AMP). The outputs from the frequency down converters (14, 16, 18, 20) are ac coupled to filtering means the outputs of which are applied to an equalizer (52). The filtering means may comprise a polyphase filter (50), the frequency response of which is distorted by the ac coupling capacitors (54, 56). By applying the outputs of the filtering means to the equalizer (52) substantially all the distortion introduced by the ac coupling capacitors (54, 56) on the filter response is removed to provide an acceptable signal for detection and recovery of the modulating signal.

Abstract: A method and apparatus to set up a call between at least one standard analog terminal and a remote terminal, via a radio terminal or access a remote terminal or request a service in the network, via a radio terminal, while the radio terminal is engaged in a conversation with another remote terminal in the network.