Motorola Corporation

Motorola Mobility LLC

Motorola Solutions, Inc.

Chin Pan Wong

Charbel Khawand

Patrick Joseph Doran

Martin Thuo Karanja

Jean Khawand

Jose E Korneluk

Deborah Monks

Richard B Nicholls

Charles Jackson

Brian K Larson

Gordon W Chiu

Scott H Richards

Stephen Rocco Carsello

John Wayne Simmons

Alfred B Wieczorek

David R Heeschen

David J Graham

Ali Behboodian

Mark A Goldberg

Pratik Desai

Daniel Jose Landron

Christopher L Johnson

Mark R Poulin

Oliver F McDonald

Nader Rizq

Michael W Loos

Mansour Ghomeshi

Scott D Gleason

Vincent Vigna

A radio communication device has a baseband processor acting as an InterProcessor Communication (IPC) server and an application processor acting as an IPC client. The baseband processor and the application processor communicate with each other via an IPC network. The IPC server and the IPC client can switch functions via negotiation to allow the IPC client to become the new IPC server. The IPC network includes multiple IPC clients, and remaining IPC clients are instructed to change the IPC address of the IPC server if the IPC client becomes the new IPC server. The IPC network allows any processor that adopts the IPC as its interprocessor communication stack to co-exist together and operate as if the two were actually running on the same processor core sharing a common operating system and memory.

Interprocessor communication protocol

A mobile communication device () includes a receiver () which is normally shut off when the mobile communication device is idle. Upon the arrival of a paging time slot to which the mobile communication device is assigned, the mobile communication device turns on the receiver and begins receiving a composite signal including frequency diverse subchannels. The mobile communication device measures the delay spread of the subchannels (). The receiver then adjusts the receiver on time for the next time slot based on the delay spread of the present time slot.

Method for reducing power consumption when receiving paging channel information at a mobile communication device

An InterProcessor Communication (IPC) Protocol network () includes at least one IPC client () and an IPC server (). The IPC protocol allows for the IPC client () to register with the IPC server () which will provide the means for the two to communicate freely without any limitations on what software architectures, operating systems, hardware, etc. each depend on. The IPC protocol in one embodiment of the invention provides for dynamic IPC node configuration in a server based IPC communication management framework.

The invention provides a method and system for dynamically estimating background noise. The system includes a portable communication device, a vocoder, and a voice activated detector. Based on information received by the portable communication device, the vocoder determines parameters related to incoming information including a voicing mode indicative of the periodicity of incoming information. The voice activated detector then compares the voicing mode to a threshold to determine whether a background noise estimate should be updated. The method includes the steps of: receiving a periodicity indicator and a current comfort noise level for an incoming voice frame; comparing the periodicity indicator with a predetermined threshold if the current comfort noise level is equal to a previous comfort noise level; and maintaining a background noise estimate if the periodicity indicator exceeds the predetermined threshold and revising a background noise estimate if the periodicity indicator does not exceed the predetermined threshold.

Method for fast dynamic estimation of background noise

A high priority system access technique is provided in which an MS () instead of relying on its open loop power level routine to determine its power level for transmission of a system access request uses a higher power level to transmit its access request, such as its RACH preamble. The power level used for transmission of the RACH preamble can be dependent on the particular user and/or in the application (e.g., dispatch, streaming video, etc.). By using a higher power level than the other MSs () operating in the system (), MS () has a higher probability of gaining system access and a channel grant in an expeditious fashion. This priority access technique is very helpful for applications that require quick channel grants.

Method for providing improved access times for a communication device

A communication system () for bridging talk groups includes private network communication devices () operating within a private network system, and public network communication devices () operating within a public network system. At least one communication subsystem () is operable with both the private and public network systems. The communication subsystem () relays information between the private network communication devices () and the public network communication devices ().

Method and apparatus for bridging talk groups in public/private communication systems

A voice channel data processorand corresponding methodoperable in a wireless communications unit'sreceiver and transmitter to facilitate data transmission on a voice channel includes an encoderfor encoding data traffic as a transmit voice frame having a predetermined vocoder parameter and inserting the transmit voice frame into a stream of transmit voice frames with voice traffic and further includes a decoderfor parsing a stream of received voice frames to obtain a vocoder parameter for each, comparing the vocoder parameter for each received frame to the predetermined vocoder parameter, routing the received voice frame for processing as data traffic when the comparison is favorable, and otherwise routing the received voice frame for processing as voice traffic.

Method and apparatus for transferring data over a voice channel

A mobile communication device () receives information in a broadcast control channel () including a page message (). The mobile communication device measures certain parameters () of the control channel, such as received signal strength, channel quality, and the present automatic gain setting. These parameters are scored and weighted () to produce a signal quality metric () to determine the duration of time the mobile communication device can remain in a low power state to conserve battery charge before checking for page alert message in the broadcast control channel next.

Method of monitoring a broadcast channel for a page at a mobile communication device

A system, method and computer readable medium are provided for segmenting a cache that is shared by multiple processors. According to the method, a first segment of the cache is allocated to a first processor and a second segment of the cache is allocated to a second processor. An execution time of at least one task on the first processor is monitored. If the execution time of the at least one task is greater than an allowed execution time minus a predetermined margin, the size of the first segment of the cache that is allocated to the first processor is increased. In one preferred method, if the execution time of the at least one task is significantly less than the allowed execution time minus the predetermined margin, the size of the first segment of the cache that is allocated to the first processor is decreased.

Adaptive segmentation of shared cache

Location information is acquired through a public network system ( ) and transferred over to a private network system ( ) in order to improve location accuracy and reduce search time for a two-way radio ( ).

Method and apparatus for improved location determination in a private radio network using a public network system

The invention relates to a system and method for use in wireless packet data mode communications for enabling communication between a source device ( ) and one or more target devices ( ) with a reduced set-up time. The invention captures in a control structure ( ), one or more communication parameters ( ) during the set up of the source device ( ) and a base station ( ). Then the control structure ( ) is transmitted to the one or more target devices ( ) during the period of the source device's ( ) configuration and is utilized to configure the one or more target devices ( ) to communicate with the source device ( ) via the base station ( ), thus reducing the total time required to set-up the communications.

Control PDU for early target paging for packet data modes

A communication device employs a method and apparatus for transmitting and receiving information in a time slot. When transmitting, the communication device generates user information symbols and positions the symbols in a first portion of the time slot. The first portion of the time slot occupies less time than the time slot. The communication device then transmits the user information symbols during the first portion of the time slot only. When receiving, a communication device decodes and then encodes a received time slot, presuming the received time slot is not a truncated time slot. The communication device determines an error metric for the encoded time slot and, based on the error metric, determines whether the encoded time slot is a truncated time slot. When the encoded time slot is a truncated time slot, the communication device processes the user information symbols in the received time slot.

Method and apparatus for transmitting and receiving information in a time slot

A portable communication device (,), such as a cellular telephone, is operable in a speakerphone mode. The communication device uses a digital communication scheme, and both receives and generates vocoded signals. The speakerphone provides half duplex operation to eliminate echo. When voice activity is detected, the device activates a speaker and mutes a microphone to avoid echo. When no voice activity is detected in the received signal, the speaker is muted and the microphone activated. To determine when speech activity is present in the received signal, a novel voice activity detection (VAD) algorithm is used which takes advantage of parameters provided as part of the received vocoded signal. The new voice activity algorithm includes calculating a staggered average of the frame energy value for a sequence of received frames, and determining if the staggered average value exceeds a threshold. The algorithm also includes adjusting the threshold level by basing the threshold level on the voicing value of the present vocoded frame.

Using vocoded parameters in a staggered average to provide speakerphone operation based on enhanced speech activity thresholds

A digital signal processor (100) receives a digitally vocoded signal (102), and calculates a staggered average value (404) from the frame energy of each received frame, or the product of the frame energy and a voicing value. While the staggered average value is above a threshold voice indicator value, speech is declared present.

Method for detecting speech in a vocoded signal

In a communication device, a decoded audio signal is evaluated by a detection function (112). Two portions of the decoded audio signal spectrum are evaluated, a ringback band (206), and the remaining band(s). The signal strength in the ringback band is measured against a preselected ringback energy threshold level and the non-ringback signal strength is measured against a voice energy threshold level. Only if the ringback energy is above the ringback energy threshold level and the non-ringback band energy is below the voice energy threshold level will a ringback filter be applied to the audio signal.

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Coral Springs, FL, United States of America

Chin Pan Wong