Patent application number | Description | Published |
20080227488 | TXOP duration adaptation for dual radio devices - Transmission opportunity (TXOP) duration is adapted for a wireless local area network (WLAN) transceiver in a dual radio wireless device based on an end of free time indication associated with a wireless wide area network (WWAN) transceiver within the same device. In this manner, the occurrence of collisions between WLAN communication activity and WLAN communication activity within the dual radio device may be reduced or eliminated. | 09-18-2008 |
20080298480 | Asynchronous MIMO-OFDM spatial covariance estimation - In general, in one aspect, the disclosure describes an apparatus that includes a sample averager to construct a preliminary estimate of a spatial covariance matrix from a received communications signal. A time-domain filter with Cholesky decomposition is used to decompose the preliminary estimate of the spatial covariance matrix into product of an upper triangular matrix and complex conjugate of the upper triangular matrix. The time-domain filter with Cholesky decomposition is also used to filter the upper triangular matrix and construct an updated estimate of the spatial covariance matrix using the filtered upper triangular matrix. | 12-04-2008 |
20080310486 | PRAGMATIC ADAPTIVE MRC AND MMSE MIMO-OFDM RECEIVER ALGORITHM - An adaptive receiver algorithm is disclosed, for use in MIMO-OFDM systems. The adaptive receiver algorithm selectively chooses either the MRC technique or the MMSE technique, for optimum receiver performance, depending on the characteristics of the wireless environment. | 12-18-2008 |
20090003294 | Multiple radio platform transmission power control - In general, in one aspect, the disclosure describes an apparatus that includes a first radio to communicate with a first wireless network and a second radio to communicate with a second wireless network. A controller is used to estimate signal to noise and interference ratio (SINR) for signal being received by the first radio when the second radio is transmitting. The controller is also to determine if the estimate meets a threshold. Transmissions are permitted from the second radio while the first radio is receiving if the threshold is met. | 01-01-2009 |
20090003303 | TECHNIQUES FOR COEXISTENCE-AWARE RESOURCE ALLOCATION IN WIRELESS NETWORKS - An embodiment of the present invention provides a method, comprising using MAC coordination between a plurality of co-located radios to resolve co-located multi-radio co-existence at the MAC layer. | 01-01-2009 |
20090042555 | Method and apparatus for antenna allocation on a multi-radio paltform - In a multi-radio wireless device, a first radio and a second radio share a plurality of antennas. A MAC coordination engine may coordinate the activities of the first and second radios to facilitate the allocation of antennas to the radios. In at least one embodiment, the second radio is given priority over the first radio in the allocation of antennas. When the first radio desires to communicate, a number of antennas that is available for use may be determined. It may then be determined whether the communication should be permitted to proceed given the number of available antennas. | 02-12-2009 |
20090080401 | FLEXIBLE STARTING TIME SCHEDULING ALGORITHM FOR BITMAP COEXISTENCE PROTECTION - A flexible start time (FST) scheduling algorithm operable at a base station is disclosed, to allocate resource in the time domain based on coexistence period bitmap (CBP) feedback gathered from multi-radio user terminals. The algorithm analyzes traffic load distribution in the wireless neighborhood and determines an optimum starting time of the CBP operation for the current user. | 03-26-2009 |
20090088177 | COLLOCATED RADIO COEXISTENCE METHOD - A collocated radio coexistence method is disclosed. The method operates in the frequency domain to protect WiMAX downlink traffic from narrow band interference (e.g. harmonics) caused by other collocated radios, such as GSM 800 MHz, operating simultaneously with an 802.16-capable (WiMAX) radio in a multiple radio coexistence platform (MRP). | 04-02-2009 |
20090097456 | METHOD FOR ACHIEVING FAIRNESS IN A NETWORK - Disclosed are a method and a computer program product for achieving fairness in utilization of a channel in a network. The network includes plurality of stations such that at least one station of the plurality of stations includes at least one radio. The at least one radio may fail to access the channel even when the channel is available for performing transmission. The method includes determining a number of idle slots occurred at the channel during a disruption period when the at least one radio is unavailable for transmission. The number of idle slots occurred during the disruption period may be accumulated as a credit. Based on the accumulated credit, an initial value of a backoff counter of the at least one station may be reset. The reset initial value of the backoff counter enables the at least one radio to utilize the accumulated idle slots for next transmission. | 04-16-2009 |
20100056136 | MULTI-RADIO PLATFORM AND METHOD FOR COORDINATING ACTIVITIES BETWEEN A BROADBAND WIRELESS ACCESS NETWORK TRANSCEIVER AND CO-LOCATED TRANSCEIVER - Embodiments of a multi-radio platform (MRP) and method for coordinating activities between a broadband wireless access network (BWAN) transceiver and a co-located transceiver are generally described herein. In some embodiments, the BWAN transceiver includes a MRP coexistence controller that generates a co-located coexistence (CLC) request message in response to a request from the co-located transceiver for transmission to a BWAN base station to reserve time for communications by the co-located transceiver. The CLC request message may include parameters for a requested CLC class. When a CLC class is accepted by the base station, the BWAN base station may refrain from scheduling communications with the BWAN transceiver during the reserved time to allow interference-free communications between the co-located transceiver a local wireless device. | 03-04-2010 |
20100165959 | MULTI-RADIO CONTROLLER AND METHODS FOR PREVENTING INTERFERENCE BETWEEN CO-LOCATED TRANSCEIVERS - Embodiments of a multi-radio controller and methods for preventing interference between co-located transceivers are generally described herein. In some embodiments, the multi-radio controller operates within a multi-radio device and is configured to cause a wireless local area network (WLAN) transceiver to transmit a triggering frame after an active period of a wireless wide-area network (WWAN) transceiver. The triggering frame indicates the duration of a transmission opportunity, which may be restricted to the time between active periods of the WWAN. In response to receipt of the triggering frame, the WLAN access point is configured to transmit a downlink data frame within the transmission opportunity. | 07-01-2010 |
20110205974 | Partial bandwidth request techniques in wireless networks - An embodiment of the present invention provides a method of requesting bandwidth allocation in a wireless network, comprising using a partial bandwidth request by a mobile station (MS) operable in the wireless network to a base station (BS) operable in the wireless network, wherein the partial bandwidth request requests bandwidth for only a portion of all packets in an uplink (UL) queue. | 08-25-2011 |