Abstract: The present invention is for transmitting facsimile data over a wireless interface in a manner that minimizes the occurrence of time outs caused by wireless interface data corruption. Facsimile data to be transmitted over a wireless interface is collected and then transmitted using a wireless error detecting and correcting protocol (76). The facsimile data is re-transmitted if the data transmission is unsuccessful until the transmitting of the facsimile data is successful. Highly correlated lines in the collected facsimile data are identified if delays caused by the re-transmitting of the collected facsimile data reach a predetermined limit, and certain ones of the highly correlated lines that have a minimal impact on received facsimile data are then deleted to prevent a facsimile protocol time out (84).

Abstract: A plurality of wireless transceivers (114) for communicating messages to SCRs (Selective Call Radios) (116) include a radio transceiver (402, 404, 406, 408), and a processing system (412) coupled thereto. A periodic communication cycle (FIG. 9) is divided into a plurality of time slots, each time slot having a duration equal to or greater than the predetermined propagation delay of a signal transmitted between wireless transceivers. Each of the wireless transceivers is assigned to a corresponding one of the time slots. To transmit a message from a selected one of the wireless transceivers to a targeted SCR, the processing system of each of the wireless transceivers is adapted to locate the targeted SCR.

Abstract: According to the present invention, different frequency reuse patterns are used when scheduling critical and non-critical data transmissions. More specifically, the present invention uses a first reuse pattern for scheduling the transmission of critical data and a second reuse pattern for scheduling the transmission of non-critical data. The invention can be applied to any inbound or outbound time slotted protocol that have message fragments spanning over one or more time slots. The reuse pattern can be varied slot by slot, to use a less aggressive reuse for communicating critical data and a more aggressive reuse for communicating non-critical data. As a result, data can be communicated more reliably and throughput can be increased by protecting critical data transmissions via a less aggressive reuse.

Abstract: A method 900 of and apparatus for effecting a handoff from a first Internet Protocol (IP) connection 221 to a second IP connection 331 is disclosed.

Abstract: A prescaler (100) includes a frequency divider (102) having an input node (136) and a divider output (128). The frequency divider is coupled to a clock signal and has a predetermined divisor. Series-coupled delay elements (104, 106, 108) are coupled to the divider output and to the clock signal. Each delay element includes a delayed output (130, 132, 134) and adds a delay equal to the clock period at the delayed output. The prescaler also includes transmission gates (112, 114, 116), each transmission gate coupled between the input node and the delayed output of a corresponding one of the delay elements. When one of the transmission gates is enabled and couples the delayed output of an nth one of the delay elements to the input node, the divider output frequency equals the clock frequency divided by the predetermined divisor plus n.

Abstract: A distributive capacitor 205 and impedance matching network 201 and transmitter 101 that use the capacitor and are suitable for high density integration applications include a printed circuit substrate 303 comprising one of a printed circuit board and a silicon based substrate, a first conductive layer 305 disposed on the printed circuit substrate, a layer of dielectric material 307 disposed on the first conductive layer and having a thickness, the dielectric material having a dielectric constant more than five times greater than the dielectric constant of the printed circuit substrate; and a second conductive layer 309 disposed on the layer of dielectric material and having a second length 311 and a second width 603 that are selected so that the distributive capacitor operates as a transmission line.

Abstract: A method and apparatus for controlling the environmental conditions within a predefined area based on a network user's preferences using a personal area network is provided. The personal area network includes at least one portable communication unit associated with a network user, and has stored therein the environmental preferences (e.g., preferred temperature settings, lighting and sound conditions, etc.) of the network user for a given area (e.g., a conference room of an office building). According to one embodiment, a controller detects the presence of each portable communication unit located within the predefined area and obtains each network user's preferences from their associated portable communication units. In one embodiment, the controller considers all of the preferences of the users present within the predefined area and formulates an optimal environmental condition setting based upon all the users' preference obtained.

Abstract: A method for and wireless communications unit adapted for measuring transmission performance for a signal emanating from an antenna is discussed. The wireless communications unit includes a receiver for receiving the signal in a first and a second time interval to provide, respectively, a first and a second signal; and a channel processor for assessing a relative channel metric corresponding to the first and second signal, the relative channel metric indicative of the transmission performance of a transmission mode.

Abstract: A wireless device uses profiles associated with one or more contexts, which defines various operating situations. Depending on a context, the wireless device changes its operational behavior in accordance with a defined profile, when a context parameter changes. Among other things, the context can correspond to a wireless device location, user age, skill, or gender, or ambient environmental factors, such as temperature. For example, based on a profile associated with a location, the wireless device can change its operational behavior relative to sharing resources with other devices.

Abstract: A digital to analog converter with increased dynamic range and improved linearity and method therefore includes an input (109) coupled to a digital word; a circuit, such as a typical digital to analog converter (103, 603), operable to convert the digital word to an analog signal (411, 611), such as an analog current (413, 613), that is proportional to the digital word in a discrete continuous fashion; and an output (106, 606) to couple the analog signal to a load (115), wherein the load is coupled to a bias voltage (407, 607) that increases the dynamic range or decrease the distortion of the analog signal.

Abstract: A keypad module for use with an electronic device has a first side with a first set of keys and a second side having a second set of keys, so that one set of keys at a time can be exposed for the user. The keypad module is movable relative to the electronic device between a first position at which the first set of keys are exposed to the user and a second position at which the second set of keys are exposed to the user.

Abstract: An apparatus for driving a sectored or multi beam antenna configuration and corresponding method of level loading amplifiers is suitable for use in a transmitter. The apparatus includes a plurality of Fourier Transform Matrix (FTM) devices 501, each FTM device having a plurality of outputs 513 and a plurality of inputs 511; where the plurality of outputs of an FTM device 503 include a first output A1 and a second output B2 arranged to be coupled, respectively to a first antenna array 403 and a second antenna array 405 and these antenna arrays are included in a plurality of antenna arrays collectively comprising the antenna configuration where the first antenna array and the second antenna array corresponding to different sectors and beams, and a plurality of amplifiers 517, 519, 521, 523 corresponding to each of the FTM devices, where one of the plurality of amplifiers coupled to and driving each of the plurality of inputs.

Abstract: A wireless control unit (WCU) arranged and constructed to operate as a wireless router within a wireless network and to facilitate dynamic reconfiguration of a routing map within the wireless network and method thereof, the WCU including a receiver for receiving a presented load; a transmitter for transmitting a transmitted load; a controller for; scheduling the presented load to be transmitted on a number of wireless links with other nodes; and dynamically increasing or decreasing a number of wireless links with other nodes within the wireless network to increase a network capacity, decrease an average queue size at the WCU, decrease an average latency for the network, or decrease an average latency for a portion of the presented load that is destined for another WCU.

Abstract: A method of creating a page usage record is provided. An input signal is received. A page usage record is created in response to the input signal. An event jacket is created. The event jacket is associated with the page usage record. A request to send a page is received. A confirmation signal is received after the page has been sent. Finally, a page leg jacket is created. The page leg jacket includes at least one record. The at least one record includes information relating to the page.

Abstract: A method of creating a call detail record is provided. An input signal is received. An account identification record is created in response to the input signal. An event jacket is created. The event jacket is associated with the account identification record. A command signal to store account identification information is received. A confirmation signal is received after the account identification information has been stored. Finally, a call detail leg jacket is created. The call detail leg jacket includes at least one record. Each record includes information relating to the stored account identification information.

Abstract: An adjustable gain control (AGC) system with improved gain control accuracy and method thereof is disclosed. The system includes an offset circuit for providing an offset signal that is selectable; a gain setting source for providing a gain set signal that is dependent on a desired gain and the offset signal; and an AGC circuit, coupled to the offset signal and gain set signal, for providing a gain control signal, the AGC circuit compensating, according to the offset signal, the gain control signal for process variables corresponding to the AGC circuit to provide a plurality of predetermined gains for the amplifier that correspond, respectively, to a plurality of desired gains indicated by respective gain select signals.

Abstract: A sigma-delta DAC circuit 10 includes a sigma-delta modulator 12 for producing and outputting an n-bit digital signal representative of an input analog signal, wherein n is a positive integer greater than 1, and is preferably equal to 4, 5 or 6. A differential n-bit DAC 30 is for converting a 2n−1-bit digital signal and a 2n−1-bit inverted digital signal processed and output by a bit shifter 24 and a differential decoder 18 to a differential analog signal. The sigma-delta modulator has a movable zero for enabling dynamic spectral shaping of the differential analog signal.

Abstract: The present invention corrects for Doppler shift in both forward and reverse links in a cellular communications system including an airborne repeater. A reverse link pilot reference signal in a band similar to a communications signal band is received at a reverse link processor, and the Doppler shift in the reverse feeder link is corrected based on the reverse link pilot reference signal. The Doppler shift in the forward feeder link is also corrected based on the reverse link pilot reference signal prior to the forward feeder link being affected by the Doppler shift. The present invention also compensates for signal strength variations due to changing flight pattern positions of the repeater. Pre-compensation for forward feeder link path losses due to movement of the airplane is performed to cause communications signals transmitted to and from the cellular communications system repeater to have identical strength before the signals are transmitted to the system user cell phones within the area of coverage.

Abstract: A beacon assisted asynchronous method of wireless communication according to the present invention enables initiating and target devices (12, 14) to remain in sleep mode most of the time and to periodically wake up to asynchronously, and directly, communicate with one another. Specifically, each of the initiating and target devices (12, 14) transmits a beacon while operating in a default transmit/receive mode (40, 40a, 42, 42a) and subsequently listens for a response. Alternatively, the initiating device (12) may enter a data packet message mode to receive a beacon from the target device (14) and to subsequently transmit a data packet message to the target device (14) after receiving the first beacon. The initiating device (12) minimizes the length of time in which it must wait to receive the target device beacon by timing a corresponding target beacon receive period based on stored data such as information based on previous communication with the target device (14).

Abstract: A system (10) alerts mobile devices (12) that are powered by replenishable power sources (14). A communications link is established between a replenishment service provider and the mobile devices (12). The replenishment service provider alerts the mobile devices (12) as to the availability of one or more replenishment services within a service area.