Abstract: The layers and protocols of an air interface layering architecture are designed to be modular and can be modified and upgraded to support new features, perform complex tasks, and implement additional functionality. Prior to commencement of data communication between a first entity (e.g., an access terminal) and a second entity (e.g., a radio network), a set of layers and/or protocols is selected for negotiation. For each selected layer and protocol (i.e., each attribute), a list of attribute values considered acceptable to the first entity is determined. The selected attributes and their associated attribute values are sent from the first entity and, in response, a list of processed attributes and their associated lists of processed attribute values are received. Each list of processed attribute values includes attribute values considered acceptable to the second entity.

Abstract: An error correction circuit for use with an analog-to-digital converter (ADC) comprising a first switch and a second switch and correction capacitor arranged in parallel and coupled to the first switch. The second switch is also coupled to ground and the correction capacitor is also coupled to a reference voltage wherein the first switch is arranged to be active during a hold mode of the ADC and the second switch is arranged to be active during a sample phase of the ADC.

Abstract: A method of communications channel coding gain optimization using combined ISI cancellation and turbo decoding is provided. Log-likelihood ratio probabilities with extrinsic values are computed from previous iterations of turbo decoding and used to compute the soft-decision values of channel symbols. The soft-decision values are then used to perform intersymbol interference cancellation and generate refined channel log-likelihood ratio probabilities for the next iteration of turbo decoding.

Abstract: A communication device having a structure that utilizes a minimum number of switches to bypass a power amplifier in the communication device is disclosed. The communication device takes advantage of the half-duplex operation of the RF transmitter and receiver in the communication device to minimize the number of switches required to bypass a power amplifier in the communication device.

Abstract: A transmitter 108 converts a complex baseband signal 140 having I and Q quadrature signal components 141 and 142 for transmission by an antenna 114. An intermediate frequency based complex-to-real up-converter 130 uses subsampling to convert the complex baseband signal 140 into a real digital signal 144 having digital signal representations 174. An intermediate frequency based bandpass filtering digital-to-analog converter 132 uses Delta-Sigma, bandpass techniques to convert the real digital signal 144 into a first analog signal 146 having analog signal representations 182. A post-conversion bandpass filter 134 isolates and boosts the signal-to-noise ratio of a selected analog signal representation 186 to output a second analog signal 148 having a post-filtered selected analog signal representation 192. A tracking bandpass filter 136 further bandpasses and up-converts the second analog signal 148 to output a transmittable signal 150 having a tracking-filtered selected analog signal representation 196.

Abstract: A counter for synthesizing clock signals with minimal jitter analyzes an ongoing count to determine whether the rising edge of an output clock should be triggered by the rising edge or falling edge of an input clock signal and to further determine whether the falling edge of the output clock should be triggered by the rising or the falling edge of the falling edge of the input clock signal. The counter may be implemented as a M/N:D counter in which a phase accumulator is compared to predetermined values to select the rising and falling edges of the output clock signal. In a default condition, the rising and falling edges of the output clock signal are triggered by rising edges of the input clock signal. However, if the accumulated phase value is greater than or equal to M/2 and less than M, an overriding signal will trigger the rising edge of the output clock based on the falling edge of the previous input clock cycle.

Abstract: In a high data rate communication system, a method and apparatus for efficiently establishing a connection between an access terminal and an access network using a fast access channel and a fast access indicator. Upon receiving a fast access indicator in response to a fast access probe, an access terminal begins transmitting a traffic channel signal containing data rate control (DRC) information. The DRC information is used by the access network to transmit messages such as a traffic channel assignment message at the requested DRC rate.

Abstract: In a CDMA data communication system capable of variable rate data transmission, a time-division power assignment cyclically reduces the carrier power level to at least one sector to reduce interference in neighboring sectors. The base station determines a time-division power assignment for each sector and generates signals according to the power assignment. The mobile unit generates filter coefficients corresponding to each power level. The mobile unit estimates Carrier Signal-to-Interference (C/I) to determine a data rate for each power level. Previous iterations of the equalizer are stored and used to refine future estimates.

Abstract: A method of and system for estimating a parameter of a local maxima or minima of a function. An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local maxima or minima of the function. An estimate of the parameter is derived from the interpolation offset.

Abstract: Systems and methods for decreasing delays and thereby improving the performance of data transmissions in wireless communication systems by enabling increased data transmission rates to be selected for a reverse link between an access terminal and an access network. The new data rate is selected from several limiting rates, including a data-justified rate and a ramp-up-limited rate. In one embodiment, the data-justified rate is constrained to decrease in a controlled manner and cannot suddenly drop to 0. In another embodiment, the ramp-up-limited rate is allowed to return quickly to a sticky rate if the system is not busy rather than having to ramp up to the sticky rate according to the standard probabilities.

Abstract: The packets generated by each of multiple packet data applications are provided to a single Point-to-Point Protocol (PPP) stack and a single High-level Data Link Control (HDLC) framing layer to convert data packets into byte streams suitable for transmission through Radio Link Protocol (RLP) connections. Each of the resultant multiple byte streams is then provided to one of multiple RLP connections having different retransmission and delay properties. The RLP connection selected for sending data from each application is based on the grade of service most appropriate for the application. At the receiver, the data from the multiple RLP connections is provided to a single PPP stack.

Abstract: The invention comprises a method and apparatus for enabling a user of a personal wireless communication handset to define a macro for selectively operating a feature of the personal wireless communication handset and store the macro in the device's memory. The user can then playback the macro to effect rapid operation of the feature. The macro can be triggered by pressing a dedicated “hot key”, by pressing an overloaded existing key on the keypad, or by pressing a “soft key” under a menu-driven user interface.

Abstract: A system and method to reduce-the effects of TOA errors. A mobile unit, generates a correlation pulse when a signal transmitted from a base station is detected. The transmitted signal may be reflected or defracted such that multipath signals arrive at the mobile unit, leading to distortion in the generated correlation pulse and errors in accurate TOA measurements. The system models the response function and calculates the width of the pulse using the modeling function with a dynamically adjustable factor to indicate at what point down from the peak the pulse width will be calculated. Based on calculation of pulse width, a type of multipath signal may be determined and an appropriate correction factor applied to the measured TOA to provide a more accurate TOA determination. The system may apply correction factors to TOA signals from base stations in a mobile telephone unit or from signals received from GPS satellites.

Abstract: Method and a system method and system for a dynamic adjustment of a data request channel in a communication system are disclosed. A value of at least one variable affecting the data request channel margin is determined in accordance with conditions in the communication system. The at least one variable is then set to the determined value. The value of the at least one variable is then conveyed to a subscriber station in an adjustment message. The subscriber station determines whether the adjustment message was transmitted by a serving sector or a non-serving sector; and adjusts at least one attribute of the communication channel in accordance with the determination, thus adjusting the DRC channel margin.

Abstract: A system and method for determining timing offset errors in a low earth orbit satellite system based upon Doppler and Doppler rate of change is provided. A user terminal determines first and second timing offsets respectively associated with first and second satellite beams from respective first and second satellites. Next, the user terminal determines the Doppler and Doppler rate of change associated with the first and second satellite beams. A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset. If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.

Abstract: A method and apparatus for enhanced user control of location information for mobile devices. The method and apparatus provide user control within the mobile station of privacy policies that supervise responses to requests for location information. In an exemplary embodiment the mobile station includes a Privacy Engine, a Position Determination Module, and a User Interface. The Privacy Engine is a software module that controls the responses of the mobile station to location requests. The Privacy Engine preferably includes a Privacy Policy that may be modified by the mobile station user by means of wireless downloads, the User Interface, or by locally connected devices such as a personal computer, personal digital assistant, or laptop. Advantageously, the Privacy Engine or the Privacy Policy may be downloaded to the mobile station by means of a wireless data network or other data connection such as Bluetooth, infrared connection, Universal Serial Bus, etc.

Abstract: In a high data rate communication system, a method and apparatus for improved throughput while transmitting data packets within multiple time slots. In order to avoid unnecessary retransmissions of a packet, a subscriber station sends a Stop-Repeat signal to a base station, causing the base station to cease further transmissions of the packet. In order to enable successful decoding of a packet, a subscriber station sends a Continue-Repeat signal to a base station, causing the base station to send retransmissions of the packet during time slots beyond a predetermined default number of time slots.

Abstract: A method and system is presented that provides for a unified format for both data exchange and data storage protocols in a network. The unified data format provides for an efficient protocol for receiving, parsing, decoding, and storing varying sizes of real-time data.

Abstract: Systems and techniques are disclosed relating to communications. The systems and techniques involve transmitting to a remote location a first signal at a first energy level followed by a second signal at a second energy level, determining a target transmission energy level as a function of a target quality parameter at the remote location, and computing the second energy level as a function of the target transmission energy level and the first energy level. It is emphasized that this abstract is provided solely to assist a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

Abstract: A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses are generated in response to the detection of multiple transmissions of the reference code from multiple transmitters. However, multipath effects distort the generated correlation pulses leading to errors in the time of arrival measurements. The present invention calculates the width of the correlation pulses and determines a delay correction factor based on the pulse width. The delay correction factor is added to the measured delay time to provide a more accurate delay time, thus permitting more accurate location measurements based on time of arrival. In alternative embodiments, other signal factors may also be used to apply delay correction factors.