Patent application number | Description | Published |
20090310691 | METHODS AND SYSTEMS FOR CARRIER FREQUENCY OFFSET ESTIMATION AND CORRECTION OFDM/OFDMA SYSTEMS - Methods and apparatus for determining an accurate fractional carrier frequency offset (CFO) adjustment in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) system in an effort to properly compensate for the actual CFO between a transmitter and a receiver are provided. This enhanced fractional CFO adjustment may be based on a history of estimated fractional CFOs and estimated carrier-to-interference-plus-noise ratios (CINRs) and may be statistically derived from this history, therefore leading to a more accurate fractional CFO adjustment when compared to conventional fractional CFO estimations. A more accurate fractional CFO adjustment may lead to increased physical layer performance and decreased decoding errors (i.e., lower bit error ratio, or BER). | 12-17-2009 |
20090312073 | METHODS AND SYSTEMS FOR POWER SAVINGS USING A MESSAGE INDICATION HEADER - Techniques for signaling a mobile communications device in a special operating state that data bursts contain messages relevant to the special operating state. The signaling may be implemented using one or more bits in a frame control header (FCH). As a result, the mobile communication device may be decode the FCH first and decode data bursts only if there is an indication the data bursts contain a relevant message. Power savings may be achieved at the mobile communications device by avoiding decoding data bursts with no relevant messages. | 12-17-2009 |
20100103903 | METHODS AND SYSTEMS FOR HANDOVER USING INCREASED PROBABLITY FOR FAST RANGING SUCCESS - Techniques presented herein disclose handover using increased probability of the fast ranging success. Propagation delay of the RF signal transmitted from an MS to a target BS may be estimated based on a known propagation delay to a current serving BS and a relative difference in propagation delays to the current serving BS and the target BS, for example, as indicated by different receive times of preamble sequences transmitted from the current serving BS and the target BS. | 04-29-2010 |
20100118756 | METHODS AND SYSTEMS FOR SUPPORTING MIMO BURSTS FOR MULTICAST AND BROADCAST SERVICES - Certain embodiments of the present disclosure provide a method for supporting multicast and broadcast services (MBS) with multiple-input multiple-output (MIMO) capabilities. This can be achieved by adding specific MIMO information into existing MBS-MAP messages while providing backward compatibility. | 05-13-2010 |
20100118797 | METHODS AND SYSTEMS USING FAST DL / UL SYNCHRONIZATION FOR MOBILE SYSTEMS - Certain embodiments provide techniques and apparatus that may allow for improvements in performance and power consumption in sleep and idle mode through fast DL and UL synchronization for wireless communications systems, such as Mobile WiMAX Systems. | 05-13-2010 |
20100151862 | METHODS AND SYSTEMS FOR HANDOVER IN WIMAX NETWORKS - This application provides techniques for robust handover to a target base station, based on performing initial ranging with the target base station. The techniques might generally include scanning neighboring base stations (BSs), selecting a target BS for a handover at least based on results of the scanning, performing initial ranging with the target BS, and sending a Handover Request to the target BS. | 06-17-2010 |
20100177709 | METHODS AND SYSTEMS FOR UPLINK SCHEDULING USING WEIGHTED QOS PARAMETERS - Certain embodiments of the present disclosure proposes a flexible method for scheduling of an uplink transmission simultaneously considering all active connections of a mobile station. A decision on scheduling priority can be made based on a metric that comprises QoS parameters and current traffic measurements. The weight factors may be applied for every QoS parameter per schedule type providing flexibility of the scheduling algorithm. The proposed scheduling algorithm may be applied to satisfy different QoS requirements for each service provider and application by changing weight factors if required. | 07-15-2010 |
20100195536 | METHODS AND SYSTEMS OF REPORTING LOCATION INFORMATION THROUGH FAST-FEEDBACK CHANNELS IN WIMAX SYSTEM - Certain embodiments of the present disclosure may allow for reducing the amount of overhead associated with transmitting location information from a mobile station to a base station. | 08-05-2010 |
20100202333 | METHODS AND SYSTEMS FOR TRANSMISSION SCHEDULING DURING SLEEP MODE IN WIMAX NETWORKS - Certain embodiments of the present disclosure allow data for a second connection to be exchanged while the second connection is in a low power state that overlaps with a listening interval of a first connection. | 08-12-2010 |
20130279389 | METHODS AND SYSTEMS FOR POWER SAVINGS USING A MESSAGE INDICATION HEADER - Techniques for signaling a mobile communications device in a special operating state that data bursts contain messages relevant to the special operating state. The signaling may be implemented using one or more bits in a frame control header (FCH). As a result, the mobile communication device may be decode the FCH first and decode data bursts only if there is an indication the data bursts contain a relevant message. Power savings may be achieved at the mobile communications device by avoiding decoding data bursts with no relevant messages. | 10-24-2013 |