Broadcom Corporation

Intel Corporation

Avago Technologies International Sales Pte. Limited

Beceem Communications Inc.

Iospan Wireless, Inc.

Manish Airy

Soumen Chakraborty

Sindhu Verma

Anuj Puri

Rishi Ranjan

Erik Richard Stauffer

Kamlesh Rath

Severine E Catreux

David Gesbert

Louay A Jalloul

Partho Pratim Mishra

Arogyaswami J Paulraj

Sam P Alex

Sandeep Ps

Prashant Kota

Jose Tellado

Bertrand Martyn Hochwald

Sriram K Rajagopal

Robert G Lorenz

Gowrisankar Somichetty

Peroor K Sebastian

Shashidhar Vummintala

Arzad Alam Kherani

C Ashok Kumar Reddy

Richard Compton

Phani Boddapati

John L Fan

Hariprasad Gangadharan

Rakesh Agrawal

Amar Prakash Azad

Felix Varghese

Ramasamy Palanisamy Pugazhanthi

Huzur Saran

Sindhu Verman

Baraa Al-Dabagh

The present disclosure is directed to methods and apparatuses for increasing throughput of WLANs using queue size based intelligent reverse direction grants (RDGs). RDGs have been introduced in many WLANs to reduce the amount of overhead associated with variants of the CSMA/CD MAC protocol. Reducing overhead increases the WLANs achievable data throughput. However, RDGs are not intelligently used in WLANs, limiting their effectiveness.

System and method for increased throughput using queue size based intelligent reverse direction grants

System and method for increased throughput using queue size based intelligent proportion calculation reverse direction grants

A method and system are provided in which a mobile device may be operable for long term evolution (LTE) communication or some other wireless technology via two or more transmit antennas. The device may comprise a power amplifier for each transmit antenna with substantially similar maximum power being provided by both amplifiers. A power headroom value may be determined in the device based on path loss values between the transmit antennas and a base station and the maximum transmit power for each transmit antenna. Transmission via one of the transmit antennas may occur concurrently with transmission via another of the transmit antennas. The device may generate an indication of the determined power headroom value for communication to the base station. The power headroom value may be reported periodically or in response to a change in the power received at the base station.

Method and system for power headroom reporting in the presence of multiple transmit antennas

A method and apparatus of selecting which of a plurality of receiver chains of a mobile unit to receive wireless signals, is disclosed. One method includes measuring a first receive signal quality while all of the plurality of receiver chains are receiving wireless signals, and measuring a second receive signal quality while a subset of the plurality of receiver chains are receiving wireless signals. The subset of the plurality of receiver chains are selected to receive wireless signal unless the first receive signal quality is a threshold better than the second receive signal quality. If the first receive signal quality is a threshold better than the second receive signal quality then all the plurality of receiver chains are selected to receive wireless signals.

Selecting receiver chains of a mobile unit for receiving wireless signals

A wireless communication device is disclosed that is capable of reduced power consumption. Uplink and downlink sub-frames in a WiMAX, 802.16m or LTE environment often include several vacant symbols during which power-hungry hardware and software components need not operate at full power. By analyzing a physical layer beacon and control information of a received signal, the specific locations of data bursts can be determined, as well as periods of needed operation of a receiver module to effectively decode those data bursts. The receiver module can otherwise be controlled to operate in a LOW power state during remaining periods of vacant time, thereby conserving power consumption and extending battery life.

Wireless communication device having reduced power consumption

A wireless communication device is disclosed that is capable of performing efficient handoffs in order to maximize connection time with either a serving or target base station. The wireless communication device performs measurements of only intra-frequency base stations to avoid retuning its radio module. Based on this information, as well as stored information relating to nearby base stations, the serving base station is able to estimate a position of the wireless communication device and compare the estimated position to positions of the known base stations in order to make a handoff decision. In addition, by storing information during measurement or handoff preparation, the device is capable of skipping handoff steps, immediately return to the serving base station after handoff failure, and/or perform streamlined PLMN searching.

Wireless communication device capable of efficient handoffs

Systems and methods for regulating transmit power in a mobile station to comply with SAR limits are disclosed. A mobile station may include a processor, transmitter, and proximity sensor. The transmitter is configured to operate at a transmit power controlled by a first transmit power limit. The proximity sensor identifies how close the mobile station is to a human head. A transmit power regulator, implemented on the processor, determines the cumulative energy radiated by the transmitter over a specified number of frames. If the cumulative energy exceeds an energy limit based on a SAR limit, and the proximity sensor indicates that the mobile station is close to a human head, the transmit power regulator may decrease the transmit power limit of the transmitter.

Transmit power management for specific absorption rates

Various embodiments of the present invention recognize at least two zones of operation for a communication device. In a first zone, which is sufficiently spaced away from a human head or body that SAR limits will be met, transmit power delivered to an antenna of a communication device may be maximized within any other constraints under which the communication device operates. In a second zone, which is not sufficiently spaced away from a human head or body, transmit power is redistributed such that SAR limitations are met without affecting the transmit power control loop of the communication device. For example, a second antenna physically disposed at a different location within the communication device may be used either instead of, or in addition to, the first transmit antenna in order that the SAR limits are met.

Distribution of transmit signal to multiple transmit antennas for reduction of measured specific absorption rate

Methods of allocating a plurality of periodically distributed frames of communication between a first wireless transceiver and a second wireless transceiver are disclosed. One method includes detecting periodic data for transmission between the wireless base station and the wireless mobile unit. A transmission map that maps frequency and time slots is generated for transmission of the data packets. Allocation information is included within less than all of a plurality of transmission maps of the plurality of periodically distributed frames. The allocation information designates frequency and time slots in which data packets identified as a periodic data type are transmitted to the second wireless transceiver for the plurality of periodically distributed frames.

Allocation of periodically distributed frames of wireless communication

Methods and systems of a mobile station transmitting information to a base station are disclosed. The mobile station may transmit information with improved uplink coverage, and bandwidth requests may be more efficient. Additionally, the mobile station may transmit information over multiple uplink frames using hybrid ARQ.

Methods and systems for uplink network entry and bandwidth requests

A method and apparatus of scheduling and transmitting uplink packets within uplink sub-frames of a wireless system is disclosed. The method includes determining a size of a standard data unit, and determining if the standard data unit can be transmitted within a single sub-channel of an uplink frame by comparing the size of the standard data unit with a number of bits that can be transmitted within the uplink frame as determined by an uplink quality. If the standard data unit is too large to be transmitted within a single sub-channel of an uplink frame, then the standard data unit is divided into sub-data units. The sub-data units are transmitted over multiple uplink frames.

Scheduling and transmitting uplink packets within uplink sub-frames of a wireless system

A method and apparatus i.e. Base Station for allocating resources in a wireless communication system is provided. The method includes generating a plurality of first groups of allocation units based on one or more of a plurality of Modulation and Coding Schemes (MCSs) and traffic characteristics in the wireless communication system. The method further includes generating a second group of slots including resource allocation information for mapping first groups of allocation units to Mobile Stations (MSs) based on MCSs and traffic characteristics associated with first groups of allocation units and the MSs. Thereafter, the method persistently allocates each first group of allocation units to the MSs based on one or more of the resource allocation information and a communication state associated with each MS. Further, the method also identifies if each MS has succeeded in decoding the persistent resource allocation sent in the second group of slots.

Method and apparatus for allocating resources in wireless communication system

The present invention includes a method of optimizing a transmission mode of wirelessly transmitted data. The method includes selecting a first transmission mode based on a predetermined channel database and a first channel characterization. The first channel characterization can be based upon signals transmitted in an initial mode. An error factor is generated based on a difference between an estimated performance characteristic, and an expected performance characteristic. A subsequent transmission mode is selected based upon the predetermined channel database, the error factor and a subsequent channel characterization. The predetermined channel database can include a predetermined look-up-table that provides transmission mode selections based upon the channel characterizations. The look-up-table generally includes a plurality of quality parameter thresholds that determine the selection of a transmission mode. Another method includes receiving transmission signals that include data encoded in an initial transmission mode. A first quality parameter of the received transmission signals is measured. A subsequent transmission mode is selected based upon the quality parameter. Transmission signals are received having data encoded in the subsequent transmission mode. A second quality parameter is measured. A parameter is adjusted within selection criteria of another subsequent transmission mode based upon the second quality parameter.

System and method of dynamically optimizing a transmission mode of wirelessly transmitted information

Growing community of inventors

Santa Clara, CA, United States of America

Manish Airy