Motorola Corporation

Motorola Mobility LLC

Google Technology Holdings LLC

Brian David Storm

William Paul Alberth, Jr

David J Krause

William E Welnick

Christopher P La Rosa

Christopher N Kurby

Michael J Carney

Charles Philipp Binzel

Gregory W Chance

Christopher P LaRosa

Mark Joseph Callicotte

Kevin J Bush

Ronald F Buskey

John R Barr

Tracie Ann Schirtzinger

Colin D Frank

Jheroen Pieter Dorenbosch

Gregory Redmond Black

Anatoly S Belkin

Stephen P Emeott

Thomas V D'Amico

Peter Nanni

Stephen V Cahill

Alex P Hirsbrunner

Arthur Christopher Leyh

Feng Qian

Christopher John Becker

Scott A Steele

Brett L Robertson

Jeremy A Jacobson

Jack Anthony Gipson

Anand Bernard Alen

Michael A Eberhardt

Mang Zhu

Ludovic Tancerel

Ming D Tan

Li Su

Lowell C Hufferd, Iii

Jennifer Ann Honkisz

Joseph Cramer, Iii

Richard A Koss

William F Taranowski

Joey Chou

Dave Steckl

Qiang Guo

Xuping Zhou

Sabrina Bahadori

Yann Fouassier

Apparatus may be provided including a spectrum analyzer and decision circuitry. The spectrum analyzer may be configured to ascertain wireless signal signature data from a wide range of frequency bands. The decision circuitry may be configured to modify operation of one or both of a receiver and a transmitter based on the signal signature data.

Multi-band signal detection

A system and method for achieving wireless local area network (WLAN) communications between an access point and a mobile device are disclosed. In at least some embodiments, the system involves an access point that includes a first transceiver capable of sending and receiving first wireless communication signals in accordance with a WLAN protocol, and a first transmitter capable of sending second wireless communication signals that are cellular/WAN communication signals on a first channel. The second wireless communication signals can be received by a mobile, dual-mode (or multi-mode) wireless communication device such as a cellular telephone and, upon such receipt, WLAN communications can be established and conducted between the access point (or another access point) and the mobile device.

System and method for achieving WLAN communications between access point and mobile device

A method for maintaining timing across discontinuous activity gaps for a non-real time data interface, in a radio frequency (RF) IC is disclosed. The method comprises starting a first receive mode in the RF IC to receive analog RF signalsin response to receiving a first command from a base band (BB) IC, converting the analog RF signalsinto a first stream of digital data samples, and transmittingthe samples to the BB IC. Next, the RF IC stops the first receive modein response to receiving a second command from the BB IC and transmitsdummy data samples to the BB IC. Then the RF IC re-starts the first receive modein response to receiving a third command from the BB IC, converts analog RF signals received by the first receive mode into a second stream of digital data samples, and transmits the samples to the BB IC

Method for maintaining timing across discontinuous activity gaps for a non-real time data interface

A method in a wireless communications device for allocating neighbor signals to a candidate set based on signal allocation criteria includes dynamically changing the signal allocation criteria based on at least one of a number of signals in an active signal set and on a signal quality of a strongest of signal in the active signal set. In one embodiment the signal allocation criteria is the length of an IIR filter.

Accelerated allocation of neighbor signals to candidates in cellular communications devices

A Multiple Protocol Signal Detector, MPSD () has a mixer () that receives signal energy from a multi-band antenna system () via a low noise amplifier () and from a variable frequency synthesizer () via a first variable band pass filter (). The output of the mixer () passes through a second variable band pass filter () to an envelope detector () a power detector () and a low resolution A/D () that inputs digitized samples to a binary modulation detector, BMD (). A controller () configures the aforementioned devices of the MPSD () to detect communications using different protocols based on a scan Look Up Table ().

Multiple protocol signal detector

A wireless communication device (), including: a housing (); a controller (), the controller () configured to control the operations of the wireless communication device; memory () coupled to the controller (); a transceiver () coupled to the controller (), the transceiver () configured to send and receive wireless signals; the receive signal includes at least a control channel and a packet data channel, the control channel being configured to provide the modulation and encoding and/or decoding information necessary to process a subsequent packet of data received by the transceiver () or in preparation for transmission by the transceiver (); a monitoring module () for monitoring the control channel and controlling a dynamic scaling module (), the monitoring module () reads a parameter field from the control channel which is used to determine that the data message has certain processing needs meeting a certain threshold; the dynamic scaling module () is configured to provide energy savings by varying the voltage and frequency of a controller, substantially real-time, according to processing needs, including: (i) a performance mode when the certain threshold is met; and (ii) a default mode when the certain threshold is not met.

Wirelesss communication device and method

A method and apparatus for detecting a frequency band and mode of operation using recursive sampling and narrowing down is disclosed. The method comprises sampling () by a multi-mode wireless communication device, a broad operational frequency spectrum at a first sampling rate to produce a first set of discrete signal samples. Then, the wireless communication device compares () at least one of the energy graphs of the first set of discrete signal samples with at least one protocol-specific signature to confirm (), if an approximate match is found. When one or more approximate matches are found, the wireless communication device narrows down () the broad frequency spectrum to a reduced set of frequency band(s) that correspond to the matched protocol-specific signature(s). Then the steps of sampling (), comparing (), confirming (), and narrowing down () are recursively followed till a frequency band and mode of operation is confirmed.

Method and apparatus for detecting a frequency band and mode of operation

A system, wireless device () and method determine that a wireless device () is detecting a triggering event. The triggering event includes detecting a WLAN border cell (), detecting a first signal from an egress portal (), or detecting a degradation in signal quality. The wireless device () then detects at least one signal from an egress portal (), determines that the wireless device () is moving from the coverage area of a first communications system to the coverage area of a second communications system according to the order of signals received from the egress portal (), initiates a registration sequence with the second wireless communication system in response to determining that the wireless device () is moving from the coverage area of the first communications system to the coverage area of the second communications system, and conducts present and subsequent calls via the second wireless communication system.

System and method to improve WLAN handover behavior at entry/exit points

A circuit () and method employing logic circuitry () and memory () identifies a reverse link limited channel (). The logic circuitry () identifies a reverse link limited channel based on determining that an access probe failure occurred on a channel (). The logic circuitry () causes the memory to store reverse link limited channel data () in response to the logic circuitry () determining that the access probe failure occurred. The reverse link limited channel data (), for example, may be a channel identification associated with the channel (), a base station identification associated with the channel (), a location identification of the circuit () or any data suitable for identifying and adapting dynamically to the reverse link limited channel.

Circuit and method for adapting to reverse link limited channels

A system and method for facilitating network-to-network transitions of mobile stations comprising includes at least one access point (). At least one receiver (or) is coupled to the at least one access point. The at least one receiver (or) determines information concerning a wide area network and provides the information to the access point (). The access point () conveys the information to at least one mobile station ().

System and method for facilitating network-to-network transitions

Methods in communications devices and networks for reducing an infrastructure registration race condition. In one embodiment, a communications device transmits () a first network connection request is a first network, and after waiting a specified time interval, the communication device transmits () another network connection request to the first network. The communications device may determine the time interval, or it may be received () from the network. Alternatively, a time stamp or some other indicium is applied to the connection requests transmitted by the communications device so that a home location register or other entity may determine the order in which the requests were transmitted.

Wireless mobile station loss prevention in multi-network communication systems

An apparatus for acquiring a pseudo-random (PN) sequence timing for a code division multiple access (CDMA) radiotelephone. A buffer stores samples of representations of at least one pilot signal. A correlator coupled to the buffer is operable to correlate at least a portion of the samples with a PN sequence at each of a plurality of different PN offsets to produce corresponding correlation energies. A controller coupled to the correlator interrupts the correlator as soon as the PN sequence at a particular PN offset produces a correlation energy at least equal to an energy threshold.

Method and apparatus for acquisition of a spread-spectrum signal

A mobile wireless communications device and methods therefore, including receiving a signal (), storing a portion of the received signal (), identifying all possible pilot signals by determining slot boundary information for the stored signal portion (), determining frame boundary information and/or scrambling code information () of the stored signal portion by correlating the stored signal portion with the scrambling codes based on the slot boundary information. In other embodiments, the search is performed in real-time without storing the signal.

Frame synchronization and scrambling code indentification in wireless communications systems and methods therefor

A method of activating a radiotelephone operable in a spread-spectrum multiple access radiotelephone system. A searcher receiver () is activated, and the searcher receiver () acquires a PN sequence timing of a pilot signal. At least one demodulation branch () is activated after activation of the searcher receiver (), and the demodulation branch synchronizes to the PN sequence timing of the selected pilot signal after the searcher receiver () has acquired the PN sequence timing.

Method of and apparatus for activating a spread-spectrum radiotelephone

A method for increase receiver efficiency in a multimode communication device includes a first step of monitoring a received signal strength of a neighboring cell on a receiver channel. A next step includes determining a noise on the receiver channel from a transmitter power amplifier of the communication device. A next step includes comparing the level of interference with a predetermined threshold and with respect to the signal strength. A next step includes blanking the receiver when the transmitter power amplifier of the communication device is on and if the predetermined threshold is not exceeded indicating excessive self-interference.

Multimode background scans of different communication systems on similar frequencies

Growing community of inventors

Round Lake Beach, IL, United States of America

Brian David Storm