Abstract: To provide message waiting notification in a wireless client/server environment, the server initiates a telephone call to the client using a telephone number assigned for message waiting notification. The server inserts a telephone number assigned for message waiting notification into a calling party number field and information pertaining to the message received into a calling party name field of the sent caller identification information. The telephone network then pages the client in response to the initiated telephone call. The server then terminates the telephone call. Upon receiving the page, a caller identification device positioned within the client receives the caller identification information sent with the initialed telephone call. The client compares the telephone number contained within the calling party member field of the caller identification information against the assigned telephone number. A match indicates that the call is a message waiting notification.

Abstract: The invention relates to a mobile communication system and controlling method thereof for paging and establishing dynamically paging area, which is capable of making paging area dynamically according to position of a receiving mobile station. When a set-up signal is received, the NTP uses identifier of a BTS obtained from the location registration of the mobile station as a key for accessing paging database and accesses paging database by using the key. It makes near cell list using identifier of the BTS of the receiving MS, generates a paging list by extracting BTSs controlled by the same BSC from the near cell list and sends the paging list to each corresponding BTS. The percentage of paging success increases and the time of call connection reduce by establishing a paging area dynamically according to location of the receiving MS and paging in the dynamical paging area.

Abstract: A radio frequency communication system includes a cell site (FIG. 1), the cell site including an on-line controller (100), an off-line controller (101) and one or more peripheral units (107, 108, 110, 112, 114) arranged to support the on-line controller. The cell site is arranged to switch from the on-line controller to the off-line controller based upon a failure of the on-line controller or a failure of any peripheral unit of the one or more peripheral units arranged to support the on-line controller.

Abstract: A coplanar antenna connector which interconnects an antenna and a printed circuit board of a portable radiotelephone is described. In particular, the antenna connector includes an antenna connector conductor strip having opposing first and second ends adapted for transmitting a radiotelephone signal from a source to an antenna or from an antenna to a receiver. The connector also includes at least one antenna connector ground strip having first and second opposing ends adapted for transmitting a radiotelephone signal. The at least one antenna connector ground strip and the antenna connector conductor strip are held in coplanar alignment, preferably by a nonconducting carrier ribbon. Each of the at least one antenna connector ground strips and the antenna connector conductor strip are spaced-apart and define a gap therebetween.

Abstract: In a radio device, a switch 2 is disposed between a power amplifier 1 and an antenna 3, and during production of the radio device, the switch 2 is connected to a power meter 14. A battery voltage or a detection voltage corresponding to a predetermined transmission power is measured, and then stored as a comparison voltage in a memory 9. In use, the battery voltage or the detection voltage is compared with the comparison voltage, and upon detection of a low voltage, this fact is announced from a speaker 11 to a user.

Abstract: An wireless communication system has a master station and a slave station. The master and slave stations exchange identification signals and call signals, and include a cut-off unit for cutting off the call signals during reception of the identification signals. The cut-off unit of the master station generates a master cut-off signal after transmission of a master identification signal to the slave station. The slave station transmits to the master station a slave identification signal in response to reception of the master identification signal so that the master cut-off signal is aligned with the slave identification signal received by the master station. The cut-off unit of the slave station generates a slave cut-off signal for alignment with the reception of the master identification signal. The slave station includes a differential circuit and a correction circuit.

Abstract: A method and system for use with wireless communications systems having a plurality of groups of channels, and wherein the method and system assign specific groups of channels such that channel interference is minimized. The method and system accomplish their objects via the use of communications equipment adapted to do the following: define a geographic area; map the defined geographic area with at least one high bandwidth cell cluster wherein each cell has at least one sector; and eliminate channel adjacencies by selectively assigning channels, drawn from the plurality of groups of channels, to the at least one high bandwidth cell cluster.

Abstract: The RF section of a communication device (100) includes a receiver (106), a transmitter (108), first injection frequency generation circuit (120), and an intermediate frequency (IF) generation circuit (124). The IF generation circuit has a shared output coupled to both the receiver and transmitter, as well as a control circuit (118) for feedback control purposes. The IF generation circuit is used to generate IF for both the receiver and transmitter, thus using fewer components that two separate IF generation circuits. It includes two differently tuned voltage controlled oscillators (202, 204) which are selectively and exclusively powered by first and second power switches (234, 236), respectively. The control circuit provides a single control voltage corresponding to a desired frequency pair to both VCOs at a common control input, then selects the appropriate VCO depending on whether the communication device is receiving or transmitting.

Abstract: Method for acquiring frequency of a desired channel having a carrier frequency FMAIN, for a dynamic receiver frequency FMOBILE, from a starting frequency FSTART, in the presence of high power adjacent interfering channels, wherein the starting frequency FSTART is shifted from FMAIN by not more than a predetermined frequency gap &Dgr;F, the method includes the steps of determining a first frequency boundary and a second frequency boundary, detecting channels within a filtering bandwidth, selecting a dominant channel from the detected channels, progressing the dynamic receiver frequency FMOBILE towards the carrier frequency of the dominant channel, detecting when the step of progressing has exceeded one of the first frequency boundary and the second frequency boundary, restarting the step of detecting channels, from the other of the one of the first frequency boundary and the second frequency boundary, and repeating from the step of detecting channels.

Abstract: A telecommunications system and method is disclosed for enhancing business card services implemented within cellular networks to provide additional features to mobile subscribers. Business card information associated with a mobile subscriber can be stored within a mobile station (MS) of the mobile subscriber and transmitted by a business card application within the MS through the cellular network to another MS that has the business card application. The business card application within the sending MS records the telephone number of each receiving MS as historical data. When a change is made to the business card information, the business card application within the sending MS transmits updates to all or some of the MS's that received the business card before the change was made by using the historical data. In addition, the business card application can interface with existing supplementary services to tailor the supplementary services to the individual mobile subscriber.

Abstract: The mobile radio communication system includes a plurality of base stations and call hand over units controlling which of the base stations services a call from a mobile station. When deciding whether to hand over a call from a first base station to a second base station, both serving microcells, the call hand over units hand the call over to a third base station, serving a macrocell, based on a duration of the call regardless of changes in radio coverage of the second base station. Also, the hand over units decide whether to hand over a call from a macrocell base station to a microcell base station based on a length of time the mobile station has been within a coverage area of the microcell base station regardless of changes in radio coverage of the microcell base station.

Abstract: A booster for amplifying the signal of a mobile unit of a cellular telephone system. The booster includes a level determination device which produces a reference level based on a power level of a signal received from the mobile unit. The level determination device includes a step voltage circuit which produces a step voltage based on the power level of the signal received from the mobile unit. The step voltage is supplied to a resulting voltage circuit which produces a resulting voltage based on the step voltage, the resulting voltage suitably providing a reference level for the booster.

Abstract: A communication device (102) has a serving and neighbor list (202) and a bandmap (204, 206). Upon losing communication service (402) the device begins alternately scanning the serving and neighbor list (SNL) and subsections (302, 304, 306, 308) of the bandmap. If an appropriate carrier is found while scanning the SNL, the device reconnects to the serving system. While scanning the subsections of the bandmap, the device creates and maintains a list (312) of suitable carriers. If no carriers are found corresponding to the SNL, a serving cell is selected from the list (312).

Abstract: Current radio telecommunications cell radius estimation methods can result in spurious and inaccurate results outside regions with well sampled signal measurements. The present invention provides an improved cell radius estimation method using path loss and signal source distance data as well as a method for determining models for use in cell estimation without test data. The methods apply a fixed gradient line fit to the data to obtain cell radius estimates and to determine models for one or more geomorphology classifications. Cell radius estimates determined from the test data and the models can be used for cell distribution planning in network coverage planning applications. The invention provides improved accuracy as well as reduced costs in the network planning stage.

Abstract: A base station (222) capable of receiving reverse channel data using two over the air protocols preferably comprises a transmitter (224) and modulator (226) for forward channel transmissions in at least a first protocol, a multi-mode base receiver (228) capable of receiving data on a reverse channel using multiple protocols including the first protocol and at least a second protocol. The dual mode base station further comprises a processor (242) that receives a timing source for the second over the air protocol derived from the remote controller (216) for the second over the air protocol. The processor is preferably programmed to decode timing information from the timing source allowing the multi-mode base receiver 228 to provide a busy indicator to the transmitter 224 and modulator 226 to inhibit the reverse channel of the first over the air protocol during a period set by the busy indicator.

Abstract: A system for automatically tuning the radio equipment of an aircraft in response to a verbal communication to the system.

Abstract: A radio communications device includes a transmitter, a switch, and a measurement circuit wherein the transmitter transmits radio communications at a transmitted power. The switch couples a portion of the transmitted power during spaced apart intervals of time and blocks coupling of the portion of the transmitted power between the spaced apart intervals of time. The measuring circuit measures the coupled portion of the transmitted power during the spaced apart intervals of time. The radio communications device can also include a feedback circuit that maintains the transmitted power at a desired level responsive to the coupled portion of the transmitted power.

Abstract: A fixed cellular interface system is disclosed that includes an interface system arranged between a standard telephone unit and a fixed cellular terminal. The interface system includes a voice prompt system, which can be programmed to generate speech using the native language for the geographical region involved. The voice prompt system detects the user of the POTS phone going “off hook”, and vocally prompts the user to enter the desired number followed by the “#” sign. The interface system converts the received “#” sign to a “SEND” signal. The interface system transfers the dialed number followed by the “send” signal to the fixed cellular terminal which initiates the call to the cellular system.

Abstract: A communication system (10) has multiple satellites (20) communicating with ground stations (30) and with base stations (40). The satellites (20) are in non-geosynchronous orbit around the earth (52). A first ground station (30) transmits a data packet to a satellite (20). The data packet includes a sector number which represents an area on the earth (52) where the destination ground station (31) is located. The satellite (20) transmits the data packet to another satellite (20) if the satellite (20) is not serving an area identified by the sector number. This step is repeated until the data packet reaches a most likely satellite (20) that is most likely to be serving the area identified by the sector number. The most likely satellite (20) transmits the data packet to the destination ground station (31) if it is still serving the area identified by the sector number.

Abstract: In accordance with a method of this invention, and circuitry for performing the method, there is disclosed a process for operating a radio frequency (RF) signal power detector. The method includes the steps of (a) sampling the output of an RF detector circuit to obtain a measurement of a value of the output when no RF signal is input to the RF detector circuit; (b) storing the measurement; and (c) subtracting, when an RF signal is input to the RF detector circuit, the stored measurement from the output of the RF detector circuit to provide a subtracted output signal. In pulsed (e.g., TDMA) embodiments of this invention the step of sampling occurs between RF bursts, while in continuous wave (cw) embodiments the step of sampling occurs during a time that an RF connection is opened or otherwise blocked at an input of the RF detector circuit and a source of the RF signal.