Abstract: Disclosed is a method for locking and unlocking a mobile telephone. The method comprises setting a locking mode by receiving a locking voice, a locking-wait time and a locking number; receiving a locking voice when there is a key input in the locking mode; partially releasing the locking function when the received locking voice is identical to a registered locking voice; switching an operation mode of the mobile telephone to an idle mode, after partially releasing the locking function; and switching the operation mode of the mobile telephone back to the locking mode, when there is no key input in the idle mode until the locking-wait time has elapsed.

Abstract: A method and system for rating a data communication session between a network and a wireless device is disclosed. According to an exemplary aspect of the method, the method monitors a series of events, namely, a setup event, a begin event and an end event, which take place during a communication session. The monitoring of such events is accomplished by a data rating application which resides on the wireless device. By monitoring such events, the data rating application is then able to rate the communication session using a number of rating methods. The rating method selected includes both how to meter the data transmitted during a data communication session and determine the rate to be applied to each metered increment. Examples of methods used to meter the data include time and volume. Different rating methods which can be used to rate the communication session include, for example, application, data utilization, source of data, data type, class of service, quality of service and transmission efficiency.

Abstract: A programmable digital divider operates under the control of a division controller to derive a second synthesized frequency based on a first synthesized frequency. The programmable divider divides the first synthesized signal to derive the second synthesized signal. The division amount is an integer, but varies between integer values if necessary to achieve a non-integer average division value. The majority of the noise generated by the frequency synthesizer is generated away from the centerline frequency and is easily filtered by narrowband filter. The frequency synthesizer may optionally be incorporated into a modified phase-locked loop to generate the second synthesized signal. By using a digital divider, instead of a traditional phase-locked loop, these embodiments allow for integration of the frequency synthesizer onto an integrated circuit, thereby lowering cost and improving resistance to noise spurs. This approach is particularly suited to telecommunications applications.

Abstract: A video/audio alarm processing method and apparatus for a base station manager in a mobile radio communication system capable of classifying trouble state data of base station controllers and base stations by grades and informing to a user the trouble state as video and audio alarms in accordance with the classified grade of the trouble state data. According to the method, the data of a predetermined number of bits which is received from the base station controllers and base stations is converted and stored, and whether the trouble state data exists or not in the stored data is judged. If the trouble state data exists, it is classified by grades, and the video and audio alarms are produced in accordance with the classified grade of the trouble state data.

Abstract: A carrier reproducing apparatus and method enabling stable operation even at a low S/N, wherein, when phase signals are locked and exceed a predetermined value, a tracking circuit generates a signal and an oscillation frequency of a signal output from a numerical control oscillation circuit is controlled so that the phase signals do not exceed the predetermined value and wherein a down sampling circuit and an interpolation circuit convert signals having a frequency of more than twice the symbol rate to signals having a frequency of twice the symbol rate.

Abstract: The present invention relates to a communication system having a network (1) and a plurality of user terminals (2,3,4) that are coupled to the network via a communication channel using wireless radio frequency transmission and having a downlink channel for transmitting messages in the direction from the network to the user terminals. The downlink channel comprises a paging channel for transmission of paging messages in paging frames for initiating communication with a user terminal allocated to a paging group of a plurality of user terminals. A paging indicator channel transmitter of a paging indicator belonging to the paging group when there is a paging message for the user terminal belonging to the paging group. The user terminal processes a next paging frame transmitted on the paging channel to determine whether there is a paging message intended for the user terminal when the paging indicator has been transmitted on the paging indicator channel.

Abstract: The invention is directed to an improved two-way radio network system (15). In the preferred embodiment, the system comprises a radio (16), a first tower (17) having a defined first coverage area (23) and capable of communicating with the radio when the radio is in the first coverage area, a second tower (18) communicating with the first tower and having a defined second coverage area (24) and capable of communicating with the radio when the radio is in the second coverage area, a local hub (53) communicating with the first tower and the second tower, the first tower, second tower, and local hub so configured and arranged that a signal from the radio when the radio is in the first coverage area may be received by the first tower and communicated either to the second tower or to the local hub and communicated from the local hub to the second tower, whereby the communication capacity of the system may be increased.

Abstract: An adaptive array antenna transceiver apparatus provides: a local signal generator 24 that outputs a signal having a frequency that corresponds to the difference between the reception frequency and the transmitting frequency; a coupler 15 that separates and extracts a part of the signals from the output of the transmitters 13; a switch 21 that selects the signal output from any one of the transmitters 13; a frequency converter 22 that converts the frequency of the signal selected by the switch 21; and a switch 23 that inputs signals output by the frequency converter 22 and selectively outputs them to any one of the plurality of paths.

Abstract: A transmission apparatus with reduced current consumption for a mobile terminal is disclosed. The transmission apparatus includes an automatic gain control (AGC) amplifier for AGC-amplifying an input baseband signal; an attenuator for attenuating an output signal of the AGC amplifier; a multiplier for multiplying an output signal of the attenuator by a carrier frequency signal to convert the signal into a radio frequency (RF) signal; a first filter for filtering an output signal of the multiplier; a drive amplifier for amplifying an output signal of the first filter; a second filter for filtering an output signal of the drive amplifier; a power amplifier for amplifying an output signal of the second filter; and an antenna. When output power of the mobile terminal is lower than predetermined maximum output power of the AGC amplifier, the output signal of the AGC amplifier is transmitted through the multiplier, the first filter and the antenna.

Abstract: A method and a system are disclosed for obtaining the dynamic network state of mobile subscribers, such as subscriber location, presence or other state information. This information, which may be distributed within various core mobile network elements, is obtained via a differentiated network service gateway (DNSG) that interfaces with the mobile network elements in a manner that accommodates the network's operator enforced controls and limitations. The DNSG implements service level agreements (SLAs) that support differentiated quality-of-service (QoS) in terms of accessing the dynamic network state of the mobile subscribers. The consumers (DNSG clients) of the dynamic network state information may include applications that provide communication and transactional services to mobile subscribers based on their network state, and the mobile subscribers themselves.

Abstract: A survey system (52, 154) is configured to identify radio stations (92) to which tuners (26) are tuned. The tuners (26) have predetermined signals (30) emitted therefrom. In one embodiment, the survey system (52) employs a method (86) which includes selecting one of the predetermined signals (30), receiving at a receiver (54) a second signal (116), and determining that one of the tuners (26) is tuned to one of the radio stations (92) when a harmonic (44, 46) of the fundamental frequency (42) of the predetermined signal (30) is detected within the second signal (116). In an alternative embodiment, the survey system (154) employs a method (182) that includes generating and broadcasting a survey signal (162) that is a one of the predetermined signals (30) modified to incorporate a signal identifier (212, 216).

Abstract: An integrated communications system. Comprising a substrate having a receiver disposed on the substrate for converting a received signal to an IF signal. Coupled to a VGA for low voltage applications and coupled to the receiver for processing the IF signal. The VGA includes a bank pair having a first bank of differential pairs of transistors and a second bank of differential pairs of transistors. The bank pair is cross-coupled in parallel, the IF signal is applied to the bank pair decoupled from a control signal used to control transconductance output gain of the bank pair over a range of input voltages. A digital IF demodulator is disposed on the substrate and coupled to the VGA for low voltage applications, for converting the IF signal to a demodulated baseband signal. And a transmitter is disposed on the substrate operating in cooperation with the receiver to establish a two way communications path.

Abstract: A method and a system for transmitting e-mail messages to, and displaying the contents of such messages by, a low bandwidth device, such as a wireless communication device for example. The system and method are particularly preferred for WAP-enabled devices of any type. The system and method are operative with any e-mail protocol.

Abstract: A method of initializing a link between a mobile terminal of a public mobile network and a domestic base station, for example a public switched network base station, comprises authentication of the mobile terminal by the public mobile network, transmission of data for initializing the link with the domestic base station to the terminal from the public mobile network and transmission of the data from the mobile terminal to the domestic base station. The public mobile network operator can therefore manage the channels used by the mobile terminal for the link with the domestic base station. The method further assures authentication that is as secure as that of the public mobile network.

Abstract: The invention is related to a base station for a cellular network, the base station being connected via the radio path to the mobile stations (MS) in the area of a cell formed by the base station and via a transmission network to the means controlling the base station (MSC). The base station comprises (a) a first group of units forming a physical interface for the transmission network and a radio interface for the mobile stations (MS), and (b) an internal bus system, which comprises several buses into which the units are connected and by means of which the units are connected to each other. In order to efficiently provide other telecommunications services, the base station has a second group of units, which forms at least one interface for other external devices, and the base station is equipped with an internal cross-connection for switching traffic at least between the external devices and the transmission network.

Abstract: A method and apparatus for mitigating communications interference between satellite communications systems in different orbits is disclosed. The method comprises the steps of evaluating a geometrical relationship between a second ground station and the satellites in the second satellite constellation, and directing communications between the second ground station and the second satellite according to the evaluated geometrical relationship. In one embodiment communications are handed over from a first satellite to another satellite when the first satellite is no longer at the highest elevation angle of visible satellites. In another embodiment, handover occurs when the first satellite drops below a minimum elevation angle.

Abstract: A phase error detector that detects phase error between differential signals. A quadrature oscillator provides in-phase (I) and quadrature phase (Q) differential carrier signals and receives a phase error signal from the phase error detector. The oscillator maintains a quarter cycle phase delay between the I and Q carrier signals based on the phase error signal. The phase error detector includes a summing network and first and second bipolar transistor mixer circuits. The summing network develops four sum signals by summing respective pairs of the differential components of the I and Q carrier signals. A bias circuit biases the transistors to turn on at positive base voltages. The mixer circuits may include filter capacitors so that the transistors are responsive to positive base voltages. The mixer circuits develop polarity signals based on the sum signals, and the resulting phase error signal is the differential of the polarity signals.

Abstract: A mobile communication terminal having a phonebook with information corresponding to alternative communication services. The information can be entered remotely from another mobile communication terminal. When a sender selects a recipient and a service from the phonebook, the mobile phone displays the information with the phonebook. The sender selects the most convenient and available communication service for the selected recipient. In an alternative embodiment, a mobile communication network maintains communication statuses of a plurality of mobile communication terminals in a status database. Upon detection of a status change of one of the mobile communication terminals, a notifying portion notifies the other mobile communication terminals of the status change.

Abstract: An apparatus and method for displaying a plurality of icons on the display of a mobile terminal are provided. One or more characteristics associated with each icon are compared to one or more context values, such as time of day, geographic area, or user profile characteristics. Icons that best match one or more context values are represented in a display format that is enlarged in relation to other icons on the display device. The context values may include dynamically changing information, such as a current location of the user, so that as the user moves to a different geographic area, different icons are enlarged on the display device. The icons can correspond to application programs; logos (such as a corporate logo); documents; Web sites; or other objects. The icons can be grouped into a context bar that is displayed along an edge of the display device, and can be arranged in a horizontal, vertical, or mixed fashion. A magnifying glass metaphor can be moved over icons to highlight and select an icon.

Abstract: The present method (300) for allocating bandwidth in a satellite communication system (500) includes determining (304) an uplink assignment of uplinks (512) to user terminals (506) and a gateway (504). The uplink assignment is preferably based on input parameters including a gateway uplink efficiency, a user terminal uplink efficiency, and a traffic ratio between the user terminal and the gateway. The method (300) also determines a downlink assignment of downlinks (516) to the user terminals (506) and one or more gateways (504). The downlink assignment is preferably based on traffic offered to the user terminals (506) and the gateways (504) as dictated by the uplink assignment. Either of the uplink assignment and downlink assignment may be integer or non-integer assignments.