Abstract: A variable rate transmission system where a packet of variable rate data is transmitted on a traffic channel if the capacity of the traffic channel is greater than or equal to the data rate of the packet. When the rate of the packet of variable rate data exceeds the capacity of the traffic channel, the packet is transmitted on a traffic channel and at least one overflow channel. Also described is a receiving system for receiving and reassembling the data transmitted on the traffic channel and at least one additional overflow channel.

Abstract: A Wireless Communication Device (WCD) includes multiple fingers that track one or more tracked transponder beams. Each tracked beam is from a respective tracked transponder. The WCD determines a tracked-beam searcher energy for each of the tracked beams, and an untracked-beam searcher energy for each of one or more untracked beams from each of the tracked transponders. The WCD attempts to determine a preferred one of the untracked beams that should become a tracked beam. This determination is made based on the tracked-beam and the untracked-beam searcher energies. The WCD assigns, or alternatively, reassigns, a finger to the preferred untracked beam when the attempt to determine a preferred untracked beam is successful. The transponders may be satellites or base stations.

Abstract: In a method and apparatus for controlling registration activity, transmission of a registration message from a node 100 is disabled upon a determination that an identity token is not present within a predetermined area of a memory 130. In an alternative implementation, registration activity is initiated by node 100 upon committing provisioning information, which task may include storing an identity token into predetermined area 130.

Abstract: In a disclosed embodiment, signal levels of the active sectors of an access terminal are compared with the signal level of the current serving sector of the access terminal. Next, a delta credit is accumulated. If a DRC lock bit is available, then an accumulated total credit is authorized to produce an authorized accumulated total credit. Afterwards, a new serving sector is identified from a pool of candidate sectors based on the signal levels of the active sectors and the authorized accumulated total credits.

Abstract: A method and apparatus for balancing the forward link capacity of a wireless communication system with the reverse link capacity of the system is presented. Speech coders with selectable modes are implemented in both links so that a forward link speech coder will not be operating with a mode set that is identical to the mode set used by a reverse link speech coder. Since the reverse link has a higher user capacity than a forward link, the reverse link speech coder can operate with a higher average data rate. Hence, the mode set used by the reverse link speech coder can be implemented without low average data rate modes. Elimination of modes from the mode set reduces complexity of the speech coder.

Abstract: A method and apparatus for selecting a communication system in accordance with the geographic region in which the subscriber station is located is described. Upon successful acquisition, a system determination processor examines the received system identification information and compares it with system identification information stored in a universal system table to determine the geographical region of the identified communication system. The system determination processor then determines whether the acquired system is the most desirable system for use in the geographical region. If it is the most desirable system for use in the geographical region, the system determination processor selects the acquired system for providing service. If it is not the most desirable system for use in the geographical region, the subscriber station attempts to acquire a more desirable system using information from the universal system table.

Abstract: A substrate antenna that includes conductive shielding positioned adjacent to and covering at least two, preferably opposing, sides of a conductive trace or antenna structure formed by the trace or traces, supported on a substrate. The conductive enclosure is realized by using a tubular material or planar conductive layers positioned adjacent to the trace. Preferably, shielding layers are disposed on at least two opposing sides of the trace. In one embodiment, a layer of dielectric material is formed over the antenna trace, and one shielding layer is formed on a surface of the substrate opposite that of the trace, and a second shielding layer is formed on the non-conductive material, effectively sandwiching the trace and substrate between them. In further embodiments, a conductive surface is formed between and joining together the two shielding layers, along either one or two sides of the trace or substrate.

Abstract: A multiple band voltage controlled oscillator capable of generating multiple operating frequencies, and a method of generating multiple operating frequencies, includes a tank circuit having a diode element and an impedance element with a radio frequency impedance in parallel with the diode element, a PIN diode connected across a portion of the inductance of the impedance element which selectively shorts the portion of the inductance of the impedance element when activated, a switch connected to selectively enable the PIN diode and correspondingly partially short the inductance of the impedance element, thereby scaling the radio frequency impedance of the tank circuit, and an oscillator circuit responsively connected to the PIN diode for varying the output of the voltage controlled oscillator based on the radio-frequency impedance present.

Abstract: A system and method for performing base station initiated call setup is provided. A base station initiated call setup may be utilized to establish a test call, to deliver a packet data services call to a subscriber unit, or to reactivate a dormant packet call. The base station transmits a BS Service Request message to the mobile switching center, requesting initiation of the call. The mobile switching center will authorize the call if the call to be set up is directed to a subscriber unit located within the service area of the base station and if the service option to be used is authorized for the particular subscriber unit. The mobile switching center will allow or disallow the call depending on the state of the subscriber unit. The mobile switching center transmits a BS Service Response message to the base station, conveying the result of processing the BS Service Request message.

Abstract: An inventive high-resolution Delta-Sigma analog-to-digital converter using a Continuous-Time implementation having suppressed sensitivity to clock jitter. The inventive method and apparatus suppresses the sensitivity to jitter by the square of the oversampling ratio when compared to current Continuous-Time implementations of Delta-Sigma modulators. The present invention eliminates the clock jitter disadvantage between sampled-data and Continuous-Time implementations of Delta-Sigma modulators. The present invention preferably includes a digital-to-analog converter that ensures that the integral of an output voltage is constant over a clock duty cycle regardless of clock jitter. The digital-to-analog converter preferably includes at least two switches and a capacitor. A first switch is used to charge the capacitor and a second switch is used to discharge the capacitor. Each switch is controlled by a clock phase wherein the sum of the two phases equals the clock duty cycle.

Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment comprises a method for performing position location using a set of signals transmitted from a set of satellites including the steps of storing coarse search data, performing a coarse search on said coarse search data for each satellite from said set of satellites, receiving fine search data, performing a set of fine searches on said fine search data, each fine search being performed on a different time segment of said fine search data, and reporting results.

Abstract: A method and apparatus for operating a wireless telecommunication system utilizing code division multiple access (CDMA) over-the-air with a Global System for Mobile communications (GSM) A-interface based network is described. A CDMA radio frequency (RF) signal interface provides a bi-directional interface to a subscriber unit, and a Global System for Mobile (GSM) communications A-interface SS7 transport provides a bi-directional interface with GSM mobile services switching center (MSC). Additionally, a transparent message transport is provided over which signaling messages defined in the GSM A-interface protocol are exchanged between the GSM MSC and a subscriber unit. Other signaling message generating by the GSM MSC and subscriber unit are processed and various actions are taken in response, including the configuration and control of signal processing resources.

Abstract: An amplifier having an adjustable current source which can be controlled to provide the requisite level of performance at reduced current consumption. The amplifier is first designed using one of many designs available and known in the art. A current source is then designed to provide adjustable bias current for the amplifier. The current source can be designed with MOSFETs which require no additional bias current and can accept a standard digital control signal. The current source can also be designed with active devices which are selected based on the logic of the control signals for ease of interface. The bias current determines the linearity and noise performance of the amplifier. The bias current is adjusted to provide the requisite level of performance while reducing power consumption. The current source can be designed to operate in discrete steps or to have substantially continuous current steps.

Abstract: A battery protection circuit for an external battery pack has a switch for controlling connection of a battery output to a load and a detector for detecting a resistance at a load output terminal. A first comparator compares the detected resistance to a predetermined maximum value, and a second comparator compares the detected resistance to a predetermined minimum value. If the detected resistance is in the range between the minimum and maximum values, a control signal is produced to enable connection of the battery output to the load. If the detected resistance is outside the range, the switch is disabled and no current can flow to the load.

Abstract: The present invention provides a method and apparatus for providing improved quality or power control by recognizing the delays inherent in a closed-loop communication system. The mobile station or receiver properly adjusts its forward link quality or power level thresholds or measurements with which it compares incoming frames or portions thereof to reflect the level it anticipates receiving (after the delay). For example, the mobile station can recognize that at a given measurement time, two outstanding messages have not been executed by the transmitter (where each message indicates a corresponding increase of 1 dB). As a result, the mobile station can adjust its measurement threshold down by 2 dB to more closely correspond to future power adjustments. If the currently received frame or portion thereof is still below the readjusted threshold, then the mobile station sends out a new message to request a further increase in the forward link channel.

Abstract: The present invention provides a method and apparatus for allowing a base station or base station controller to adjust transmissions to fixed location subscribers in closed-loop communication systems. In a closed-loop communication system, a base station exchanges signals with both fixed location and mobile user stations. When a user or subscriber initially registers with the base station, the base station determines a status of this subscriber based on, for example, an electronic serial number transmitted to the base station. The base station compares the electronic serial number to a database (Home Location Register) which determines whether the user corresponds to a fixed station or a mobile station. If the user is a fixed station, then the base station lowers nominal and minimum power level thresholds. Based on the lowered thresholds, the base station thereafter transmits forward link signals to the fixed station at a lower power level.