Motorola Corporation

Anil N Patel

Jose E Korneluk

Todd M Russell

Eric W Gettleman

Philip Schentrup

Audrey Longhurst

Mark A Goldberg

Atif A Meraj

Kristi A Haverkamp

Douglas A Lenz

Satish K Sreenivas Rao

Krishna Kishore A

Charan M N

Dave Heeschen

A system () and method () for near-end detection of voice () in speakerphone mode is provided. The method can include determining () a convergence of an adaptive filter (), determining () a dissimilarity between an autocorrelation () of an echo estimate () and an autocorrelation () of a microphone signal () if the adaptive filter has converged, computing () a weighting factor () based on the dissimilarity, applying the weighting factor to a voice activity level () to produce a weighted voice activity level (), comparing () the weighted voice activity level to a constant threshold, and performing () a muting operation in accordance with the comparing for providing half-duplex communication.

Method and system for near-end detection

A method and system of sending supplemental information during a telecommunications session includes the step () of detecting a period of silence within the telecommunications session. The period of silence can be detected from at least one member of the telecommunications session. Comfort noise can be specified within at least one time slot () of a plurality of consecutive time slots () for a channel over which the period of silence is detected. For at least one other time slot of the channel (), non-voice data is specified such that the channel includes both comfort noise and other non-voice data during the period of silence. The consecutive time slots () can be associated with a data block (). The non-voice data can be a data payload of the other time slot ().

Method and system for providing integrated data services to increase spectrum efficiency

A frequency management scheme for a hybrid cellular/GPS or other device generates a local clock signal for the communications portion of the device, using a crystal oscillator or other part. The oscillator output may be corrected by way of an automatic frequency control (AFC) circuit or software, to drive the frequency of that clock signal to a higher accuracy. Besides being delivered to the cellular or other communications portion of the hybrid device, the compensated clock signal may also be delivered to a comparator to measure the offset between the cellular oscillator and the GPS oscillator. The error in the cellular oscillator may be measured from the AFC operation in the cellular portion of the device. An undershoot or overshoot in the delta between the two oscillators may thus be deduced to be due to bias in the GPS oscillator, whose value may then be determined. That value may then be used to adjust Doppler search, bandwidth or other GPS receiver characteristics to achieve better time to first fix or other performance characteristics.

System and method for frequency management in a communication device having a positioning device

A method utilizes a training monitoring algorithm to control when full training of a transmitter of a shared communication system that utilizes dynamic channel allocation occurs. Full training of the transmitter occurs during an initial transmission slot of a training interval that is used to request allocation of fixed communication resources of the communication system or when operating conditions of the transmitter, such as power and frequency, change. The duration of the training interval is dynamically controlled by manipulation of full-power and cut-back power training interval counters.

Method for dynamic transmitter training for a shared communication system utilizing dynamic channel allocation

A subscriber (,) to a radio communication system manages information needed to monitor for potential server sites during an ongoing communication session. Upon switching server sites during an ongoing communication (,), the subscriber uses a modified neighbor site list for subsequent monitoring for potential server sites (,). The modified list is generated from the original list without benefit of new information downloaded from an external source, by replacing information representing the new server site with information representing the old server site (,).

Method for subscriber based management of neighbor list information during a communication session

A subscriber (510) to a radio communication system acquires new neighbor cell information after switching to a new server site (530) during lulls in an ongoing communication session. In one embodiment, the new server site (530) broadcasts neighbor cell list information during lulls in the communication activity on the communication channel in an unsolicited manner (710, 720). In an alternative embodiment, the subscriber (510) first transmits a request to the server site for neighbor cell list information during a lull in communication activity (810, 820). The server site (530) responds by transmitting neighbor cell list information during one or more lulls in communication activity on the communication channel (830, 840).

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Coral Springs, FL, United States of America

Anil N Patel