Google Inc.

Motorola Mobility LLC

Intel Corporation

Motorola Corporation

Google Technology Holdings LLC

Brett L Robertson

Krishna K Bellamkonda

Nischal Patel

Eric LeRoy Krenz

Dean E Thorson

Istvan Janos Szini

Malhar Vaishnav

Brian Keith Classon

Maninder Singh Sehmbey

Brian David Storm

Feng Qian

Morris B Bowers

Paul B Crosbie

Hideki Yoshino

Ramakrishna Yellapantula

Niels Vinggaard

Jarrett K Simerson

Li Su

Hui Wang

Ashish Batra

Joanne M Beaumont

Vivek Ramaprasad

Ramakrishna V Yellapantula

Karthik Nagasubramanian

Jlng Ji

Daniel P Rose

Maninder S Sehmbey

Disclosed apparatuses obtain real-time performance measurements and adaptively select multiple-input, multiple-output (MIMO) antennas to improve MIMO antenna performance. A correlation estimator determines an approximation of instantaneous antenna correlation values. One method includes obtaining a channel quality indicator (CQI) measurement for first and second antennas of a mobile device. The method determines a composite CQI for the two antennas and estimates the antenna correlation for the first and second antennas based on the composite CQI. The method can include performing a lookup operation in a CQI table mapping composite CQI to coding rates. The method can include obtaining a signal-to-noise ratio (SNR) measurement for the first and second antennas of the mobile device, and estimating the antenna correlation for the first and second antennas based on the composite CQI and the SNR measurement.

Apparatus and methods for antenna correlation estimation in a multi-antenna system

A method includes collecting roaming connectivity information for a plurality of wide area networks from a plurality of mobile devices, independently of the wide area networks, receiving the roaming connectivity information at a server and relating the connectivity information to the wide area networks and to a plurality of geographic locations to create a roaming network connectivity information database, generating a list of candidate wide area networks to serve as roaming networks for a specific mobile device and a given location based on the roaming connectivity information, and sending a preferred roaming list to the specific mobile device, the preferred roaming list including the list of candidate wide area networks. The method may include receiving location prediction information from the mobile device, and generating the list of candidate wide area networks based on a predicted location.

Methods and apparatus for radio network scanning using geo-tagged information from wireless client devices of heterogeneous wide area networks

A method includes collecting physical layer and data layer connectivity information from a plurality of wide area networks using a plurality of mobile devices independently of the wide area networks. A server receives the physical layer and data layer connectivity information, relates the connectivity information to specific wide area networks and to a plurality of geographic locations to create a network statistics database. The server also receives mobile device state information including mobile device location information and predicts that connectivity for a specific mobile device will fall below acceptable criteria based on the network statistics database. The server generates a list of candidate donor mobile devices to serve as data connection sources for the specific mobile device based on the network connectivity information and the mobile device state information and selects a donor device from the list of candidate donor devices based on a weighting algorithm.

Management of ad-hoc peer-to-peer connections to provide data network access using a plurality of heterogeneous wide area networks

An electronic system performs thermal management during its operation by proactively taking into account expected solar thermal loading. According to one embodiment, the electronic system determines its location and a solar thermal load value expected to affect its location. The system also determines a temperature offset value based on the solar thermal load value and predicts a future temperature for the system based on the temperature offset value and a then-current temperature for the system (e.g., as may be detected by one or more temperature sensors). The electronic system compares the predicted temperature to at least one threshold and executes a thermal mitigation procedure in the event that the predicted temperature exceeds one or more of the thresholds. According to another embodiment in which the electronic system is transportable, the determined solar thermal load value may include a solar thermal load profile for the system's expected route of travel.

Electronic system and method for thermal management therein taking into account solar thermal loading

A disclosed method of operation includes generating a first resolution geographic descriptor that identifies a first size geographic grid area. The first size geographic grid area includes a specific location identified by mobile device location data but does not identify the specific location. The method proceeds with adjusting the first resolution geographic descriptor to a second resolution geographic descriptor, by increasing or decreasing the resolution to correspondingly decrease or increase, respectively, the corresponding geographic grid area to a second size geographic grid area that includes the specific location. An information update is then sent to a server. The information update includes the second resolution geographic descriptor but does not provide the mobile device location data, in order to preserve the mobile device user's anonymity.

Method and apparatus for enforcing tiered geographical anonymity in a mobile device

Apparatuses and methods are disclosed for determining a dominant figure-of-merit for an antenna system comprising a primary antenna, and at least two diversity antennas. The dominant figure-of-merit is determined from at least two figure-of-merit types related to performance of the primary antenna when paired with one or the other of the at least two diversity antennas. The disclosed apparatuses and methods include switching to one or the other of the at least two diversity antennas, to obtain the dominant figure-of-merit, in response to a signal quality metric's relationship to the at least two figure-of-merit types.

Apparatus and methods for adaptive antenna diversity in a multi-antenna system

A method () and apparatus () for cell detection in a wireless communication system may include acquiring (), using a transceiver, synchronization to first radio frame boundaries of a first physical channel from a cell. The method may include attempting to decode frames () of a second physical channel that has second radio frame boundaries that are a multiple of the first radio frame boundaries. The method may include performing () a cyclic redundancy check on the frames of the second physical channel. The method may include extracting () predictable information from a payload from frames that fail the cyclic redundancy check.

Method and apparatus for cell detection in a wireless communication system

A communication controller and a method is provided for synchronizing a wireless communication device and a wireless communication network having two or more transmit antennas, which support transmit diversity. A reference signal is received from the wireless communication network via each one of a pair of the two or more transmit antennas. A preferred phase offset is then determined for the pair of transmit antennas, and then transmitted to the wireless communication network. Further adjustments of the requested phase and amplitude of the communications transmitted using the pair of transmit antennas are suspended, until further transmissions are received from the wireless communication network via the corresponding transmit antennas, which can be decoded in accordance with the preferred phase offset or a timer has elapsed corresponding to the maximum time needed for the wireless communication network to receive the preferred phase offset and synchronize to the same.

Method and controller for syncronizing a wireless communication device and network

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 window error detector for a receiver capable of operating in a discontinuous transmit mode includes a soft decision decoder (,) producing soft output and generating window error signals. A detector (,) is coupled to the soft decision decoder for detecting a bad frame when the window error exceeds a bad frame threshold, wherein the threshold is altered based on the discontinuous transmit state. A turbo decoder (,) for a receiver includes a soft decision decoder and a window error detector (,) coupled to the soft decision decoder. The window error detector generates a bad frame indication. The turbo decoder stops iterative processing of the data associated with a window when the window error detector detects that the window does not result in a bad frame indication.

Bad frame detector and turbo decoder

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Mundelein, IL, United States of America

Brett L Robertson